In the southern subregion of sub-saharan africa, which country is mainly covered by the kalahari desert?

In the Southern subregion of sub-Saharan Africa, the country which is mainly covered by the Kalahari Desert is Botswana. Other countries which are touched by the Kalahari Desert are Namibia and South Africa. The Kalahari Desert is a large semi-arid sandy savanna in the southern portion of Africa. It spans 350,000 square miles and is home to many animals.

Magma forms by partial melting of upper mantle and crust. partial melt means that only a fraction of the available material forms a melt, and that the remainder stays solid. the partial melt rises because of its lower density and ascends through he crust. this is so conclusive mean the answer would be magma igneous rocks or balistic magma.

Answer the use of flood plains and irrigation;