Information:  - De Rust is a small village at the gateway to the Klein Karoo . De Rust is located at the foot of the Swartberg Mountain range between Oudtshoorn and Beaufort West . De Rust is also known for the meandering Meiringspoort pass . Meiringspoort is a gateway that connects the Klein Karoo ( little Karoo ) and the ( great ) Karoo through a gorge with a 25 km road crossing the same river 25 times in the span of the 25 km. This area is also well known for ostrich farming and most of the farmers in the area either farm exclusively with ostriches or as a sideline to their existing farming .  - A desert is a barren area of land where little precipitation occurs and consequently living conditions are hostile for plant and animal life. The lack of vegetation exposes the unprotected surface of the ground to the processes of denudation. About one third of the land surface of the world is arid or semi-arid. This includes much of the polar regions where little precipitation occurs and which are sometimes called polar deserts or "cold deserts". Deserts can be classified by the amount of precipitation that falls, by the temperature that prevails, by the causes of desertification or by their geographical location.  - The Karoo (; from a Khoikhoi word, possibly "garo" "desert") is a semi-desert natural region of South Africa. There is no exact definition of what constitutes the Karoo, and therefore its extent is also not precisely defined. The Karoo is partly defined by its topography, geology, and climate  above all, its low rainfall, arid air, cloudless skies, and extremes of heat and cold. The Karoo also hosted a well-preserved ecosystem hundreds of million years ago which is now represented by many fossils.  - The lion ("Panthera leo") is one of the big cats in the genus "Panthera" and a member of the family Felidae. The commonly used term African lion collectively denotes the several subspecies in Africa. With some males exceeding in weight, it is the second-largest living cat after the tiger. Wild lions currently exist in sub-Saharan Africa and in India (where an endangered remnant population resides in Gir Forest National Park). In ancient historic times, their range was in most of Africa, including North Africa, and across Eurasia from Greece and southeastern Europe to India. In the late Pleistocene, about 10,000 years ago, the lion was the most widespread large land mammal after humans: "Panthera leo spelaea" lived in northern and western Europe and "Panthera leo atrox" lived in the Americas from the Yukon to Peru. The lion is classified as a vulnerable species by the International Union for Conservation of Nature (IUCN), having seen a major population decline in its African range of 3050% over two decades during the second half of the twentieth century. Lion populations are untenable outside designated reserves and national parks. Although the cause of the decline is not fully understood, habitat loss and conflicts with humans are the greatest causes of concern. Within Africa, the West African lion population is particularly endangered.    Given the information above, choose from the list below the object entity that exhibits the relation 'country' with the subject 'de rust'.  Choices: - greece  - india  - north africa  - south africa  - world
south africa