Information:  - A tunnel is an underground passageway, dug through the surrounding soil/earth/rock and enclosed except for entrance and exit, commonly at each end. A pipeline is not a tunnel, though some recent tunnels have used immersed tube construction techniques rather than traditional tunnel boring methods.  - A glacier (or ) is a persistent body of dense ice that is constantly moving under its own weight; it forms where the accumulation of snow exceeds its ablation (melting and sublimation) over many years, often centuries. Glaciers slowly deform and flow due to stresses induced by their weight, creating crevasses, seracs, and other distinguishing features. They also abrade rock and debris from their substrate to create landforms such as cirques and moraines. Glaciers form only on land and are distinct from the much thinner sea ice and lake ice that form on the surface of bodies of water.  - Ladakh ("land of high passes") (Ladakhi:  "la'dwags"; ) is a region in Indian state of Jammu and Kashmir that currently extends from the Kunlun mountain range to the main Great Himalayas to the south, inhabited by people of Indo-Aryan and Tibetan descent. It is one of the most sparsely populated regions in Jammu and Kashmir and its culture and history are closely related to that of Tibet.  - A drainage basin or catchment basin is an extent or an area of land where all surface water from rain, melting snow, or ice converges to a single point at a lower elevation, usually the exit of the basin, where the waters join another body of water, such as a river, lake, reservoir, estuary, wetland, sea, or ocean. Thus if a tributary stream joins a brook that in turn joins a small river which is a tributary of a larger river, there is a series of successively larger (and lower elevation) drainage basins. For instance, the Missouri and Ohio rivers are within their own drainage basins and also within the drainage basin of the Mississippi River.  - A stream is a body of water with a current, confined within a bed and banks. Depending on its location or certain characteristics, a stream may be referred to as a "bayou", "beck", "branch", "brook", "burn", "creek", "crick", "ghyll", "gill", "kill", "lick", "mill race", "race", "rill", "river", "rivulet", "run", "runnel", "streamage", "syke", or "wash".  - The Tibet Autonomous Region (TAR) or Xizang Autonomous Region, called Tibet or Xizang for short, is a province-level autonomous region of the People's Republic of China (PRC). It was formally established in 1965 to replace the Tibet Area, an administrative division the PRC inherited from the Republic of China (ROC), about 5 years after the dismissal of the Kashag by the PRC following the 1959 Tibetan uprising, and about 13 years from the Tibet's incorporation into the PRC in 1951.  - Jammu and Kashmir is a state in northern India, often denoted by the acronym J&K. It is located mostly in the Himalayan mountains, and shares borders with the states of Himachal Pradesh and Punjab to the south. Jammu and Kashmir has an international border with China in the north and east, and the Line of Control separates it from the Pakistani-administered territories of Azad Kashmir and Gilgit-Baltistan in the west and northwest respectively. The state has special autonomy under Article 370 of the Constitution of India.  - In geology and earth science, a plateau (or ; plural plateaus or plateaux), also called a high plain or tableland, is an area of highland, usually consisting of relatively flat terrain that is raised significantly above the surrounding area, often with one or more sides with steep slopes.  - The Yangbajing Tunnel is the longest tunnel , some 3,345 metres long , of the Qinghai -- Tibet Railway which links Xining with Lhasa across the high Tibetan Plateau of north - east China . It is 4,264 metres above sea level and located 80 kilometres NW of the Tibetan regional capital , Lhasa . It is longest tunnel on the line from Goldmod to Lhasa , and part of one of the highest railways in the world , The highest rail tunnel in the world is the 1,338 m Fenghuoshan tunnel which is situated at 4,905 m above sea level , and called `` the nearest door to the heaven . '' This railroad totals a combined length of 160 km of 675 bridges . 550 km is situated on permafrost . Because of its length and extreme elevation , maintaining air quality , as affected by the specially designed high altitude diesel engines which operate in series , is problematical .  - Central Asia or Middle Asia is the core region of the Asian continent and stretches from the Caspian Sea in the west to China in the east and from Afghanistan in the south to Russia in the north. It is also colloquially referred to as "the 'stans" (as the six countries generally considered to be within the region all have names ending with the Persian suffix "-stan", meaning "land of") and is within the scope of the wider Eurasian continent.  - The Fenghuoshan Tunnel is the highest railway tunnel in the world. It is 1,338 metres (4,390 feet) long, and stands 4,905 meters (16,093 feet) above sea level. It is part of the QinghaiTibet Railway, linking Qinghai and Tibet that was completed in 2006.  - Western China and rarely known as, refers to the western part of China. In the definition of the Chinese government, Western China covers one municipality: Chongqing; six provinces: Sichuan, Guizhou, Yunnan, Shaanxi, Gansu, and Qinghai; and three autonomous regions: Tibet, Ningxia, and Xinjiang.  - China, officially the People's Republic of China (PRC), is a unitary sovereign state in East Asia. With a population of over 1.381 billion, it is the world's most populous country. The state is governed by the Communist Party of China, and its capital is Beijing. It exercises jurisdiction over 22 provinces, five autonomous regions, four direct-controlled municipalities (Beijing, Tianjin, Shanghai, and Chongqing), and two mostly self-governing special administrative regions (Hong Kong and Macau), and claims sovereignty over Taiwan. The country's major urban areas include Shanghai, Guangzhou, Beijing, Chongqing, Shenzhen, Tianjin and Hong Kong. China is a great power and a major regional power within Asia, and has been characterized as a potential superpower.  - The QinghaiTibet railway or Qingzang railway, is a high-elevation railway that connects Xining, Qinghai Province to Lhasa, Tibet Autonomous Region of China.  - The Tibetan Plateau, also known in China as the QinghaiTibet Plateau or the Qingzang Plateau or Himalayan Plateau, is a vast elevated plateau in Central Asia and East Asia, covering most of the Tibet Autonomous Region and Qinghai Province in western China, as well as part of Ladakh in Jammu and Kashmir state of India. It stretches approximately north to south and east to west. With an average elevation exceeding , the Tibetan Plateau is sometimes called "the Roof of the World" and is the world's highest and largest plateau, with an area of (about five times the size of Metropolitan France). Sometimes termed the Third Pole, the Tibetan Plateau contains the headwaters of the drainage basins of most of the streams in surrounding regions. Its tens of thousands of glaciers and other geographical and ecological features serve as a "water tower" storing water and maintaining flow. The impact of global warming on the Tibetan Plateau is of intense scientific interest.  - Global warming and climate change are terms for the observed century-scale rise in the average temperature of the Earth's climate system and its related effects. Multiple lines of scientific evidence show that the climate system is warming. Although the increase of near-surface atmospheric temperature is the measure of global warming often reported in the popular press, most of the additional energy stored in the climate system since 1970 has gone into the oceans. The rest has melted ice and warmed the continents and atmosphere. Many of the observed changes since the 1950s are unprecedented over tens to thousands of years.  - Xining ("Xníng" ; "Ziling"; "Seleng") is the capital of Qinghai province in western China, and the largest city on the Tibetan Plateau. It has 2,208,708 inhabitants at the 2010 census whom 1,198,304 live in the built up area made of 4 urban districts.  - East Asia is the eastern subregion of the Asian continent, which can be defined in either geographical or ethno-cultural terms. Geographically and geopolitically, it includes China, Hong Kong, and Macao; Mongolia and Taiwan; North and South Korea; and Japan; it covers about , or about 28% of the Asian continent, about twice the area of Europe.  - Qinghai, formerly known in English as Kokonur, is a province of the People's Republic of China located in the northwest of the country. As one of the largest province-level administrative divisions of China by area, the province is ranked fourth-largest in size, but has the third-smallest population.  - Metropolitan France (or "la Métropole"), also known as European France, is the part of France in Europe. It comprises mainland France and nearby islands in the Atlantic Ocean, the English Channel, and the Mediterranean Sea, including Corsica. Overseas France ("la France d'outre-mer") is the collective name for the part of France outside Europe: French overseas regions ("départements et régions d'outre-mer" or "DROM"), territories ("territoires d'outre-mer" or "TOM"), collectivities ("collectivités d'outre-mer" or "COM"), and the sui generis collectivity ("collectivité sui generis") of New Caledonia.  - Asia is Earth's largest and most populous continent, located primarily in the eastern and northern hemispheres and sharing the continental landmass of Eurasia with the continent of Europe. Asia covers an area of , about 30% of Earth's total land area and 8.7% of the Earth's total surface area. The continent, which has long been home to the majority of the human population, was the site of many of the first civilizations. Asia is notable for not only its overall large size and population, but also dense and large settlements as well as vast barely populated regions within the continent of 4.4 billion people.  - Tibet (Tibetan Pinyin: "boe", ; /i ts¹/) is a region on the Tibetan Plateau in Asia. It is the traditional homeland of the Tibetan people as well as some other ethnic groups such as Monpa, Qiang, and Lhoba peoples and is now also inhabited by considerable numbers of Han Chinese and Hui people. Tibet is the highest region on Earth, with an average elevation of . The highest elevation in Tibet is Mount Everest, Earth's highest mountain, rising 8,848 m (29,029 ft) above sea level.  - Kashmir is the northernmost geographical region of the Indian subcontinent. Until the mid-19th century, the term "Kashmir" denoted only the valley between the Great Himalayas and the Pir Panjal mountain range. Today, it denotes a larger area that includes the Indian-administered territory of Jammu and Kashmir (subdivided into Jammu, Kashmir, and Ladakh divisions), the Pakistani-administered territories of Azad Kashmir and Gilgit-Baltistan, and Chinese-administered territories of Aksai Chin and the Trans-Karakoram Tract.   - Lhasa is a city and administrative capital of the Tibet Autonomous Region of the People's Republic of China. The main urban area of Lhasa is roughly equivalent to the administrative borders of Chengguan District, which is part of the wider Lhasa prefecture-level city, an area formerly administered as a prefecture.    After reading the paragraphs above, we are interested in knowing the entity with which 'yangbajing tunnel' exhibits the relationship of 'part of'. Find the answer from the choices below.  Choices: - 16  - 1959  - 19th century  - asia  - bed  - beijing  - body  - china  - chinese  - city  - communist party of china  - constitution  - division  - drainage basin  - earth  - english  - eurasia  - europe  - france  - french  - geology  - gill  - glacier  - government  - himalayas  - history  - homeland  - japan  - karakoram  - may  - mediterranean sea  - mountain range  - ocean  - part  - population  - qingzang railway  - river  - science  - series  - sovereign state  - state  - the republic
The answer to this question is:
qingzang railway