Information:  - The Maghreb (or ; literally "sunset"; ', "the Arab West" previously known as Barbary Coast, derived from Berber), or the Greater Maghreb ("al-Maghrib al-Kabr"), is usually defined as much or most of the region of western North Africa or Northwest Africa, west of Egypt. The traditional definition as the region including the Atlas Mountains and the coastal plains of Morocco, Algeria, Tunisia, and Libya, was later superseded, especially following the 1989 formation of the Arab Maghreb Union (  ), by the inclusion of Mauritania and of the disputed territory of Western Sahara (mostly controlled by Morocco). During the Al-Andalus era in Spain (7111492), the Maghreb's inhabitants, Maghrebis, were known as "Moors"; the Muslim areas of Spain in those times were usually included in contemporary definitions of the Maghrebhence the use of "Moorish" or "Moors" to describe the Muslim inhabitants of Spain in Western sources.  - The Old World consists of Africa, Europe, and Asia, regarded collectively as the part of the world known to Europeans before contact with the Americas. It is used in the context of, and contrast with, the New World (Americas).  - Casablanca (local informal name: "Kaa") is the largest city in Morocco, located in the central-western part of the country bordering the Atlantic Ocean. It is the largest city in the Maghreb, as well as one of the largest and most important cities in Africa, both economically and demographically.  - Tensift is a river in central Morocco . It takes spring in the eastern High Atlas , north of the Tizi - n - Tichka pass . It passes close to the city of Marrakesh and has its outlet into the Atlantic Ocean at the ancient fortress of Souira Qedima , around 40 km south from Safi . Its water discharge changes according to rainfall ; it is one of the ten major rivers of Morocco , but frequently can be waded through even close to its outlet .  - High Atlas, also called the "Grand Atlas Mountains"  is a mountain range in central Morocco in Northern Africa.  - Morocco (', lit. "The West"; '), officially known as the Kingdom of Morocco (', lit. "The Western Kingdom"; '), is a sovereign country located in the Maghreb region of North Africa. Geographically, Morocco is characterized by a rugged mountainous interior, large tracts of desert, and a lengthy coastline along the Atlantic Ocean and Mediterranean Sea.  - The New World is one of the names used for the Earth's Western Hemisphere, specifically the Americas (including nearby islands such as those of the Caribbean and Bermuda).  - The Atlantic Ocean is the second largest of the world's oceans with a total area of about . It covers approximately 20 percent of the Earth's surface and about 29 percent of its water surface area. It separates the "Old World" from the "New World".  - The Mediterranean Sea (pronounced ) is a sea connected to the Atlantic Ocean, surrounded by the Mediterranean Basin and almost completely enclosed by land: on the north by Southern Europe and Anatolia, on the south by North Africa, and on the east by the Levant. The sea is sometimes considered a part of the Atlantic Ocean, although it is usually identified as a separate body of water.  - North Africa or Northern Africa is the northernmost region of Africa. The United Nations definition of "North Africa" includes seven countries and territories; Algeria, Egypt, Libya, Mauritania, Morocco, Sudan, Tunisia, and Western Sahara. The countries of Algeria, Morocco, Tunisia, and Libya are often collectively referred to as the Maghreb, which is the Arabic word for "sunset". Egypt lies to the northeast and encompasses part of West Asia, while Sudan is situated on the edge of the Sahel, to the south of Egypt.  - Marrakesh, also known by the French spelling Marrakech (or  "Murrkuš"), is a major city of the Kingdom of Morocco. It is the fourth largest city in the country, after Casablanca, Fes and Tangier. It is the capital city of the mid-southwestern region of Marrakesh-Safi. Located to the north of the foothills of the snow-capped Atlas Mountains, Marrakesh is located southwest of Tangier, southwest of the Moroccan capital of Rabat, south of Casablanca, and northeast of Agadir.    'tensift river' is related to which object entity through the relation of 'continent'?  Choices: - africa  - europe  - the americas
The answer to this question is:
africa