Apartheid means total racial separation, i.e. segregation.
The word means "apartness" in the Afrikaans (Dutch-based South African) language.
tigris and euphrates
Lake Victoria is the largest body of water in Africa.
Nigeria Depends on the area you consider as 'West Africa'. Mauritania is marginally bigger than Nigeria, and if you are prepared to consider non-coastal countries, Mali is even bigger. Look at a maqp of Africa and find out what you consider as 'West Africa'.
Danube
The capital city of Burundi is Bujumbura
Tunisia
somalia
Ethiopia
East African Highlands.
Ravines and chasms.