C. Divergent plate because the African and Arabian plates are separating from one another.
Soils form from the interplay of five main factors namely Parent material, Time, Climate, Relief and Organisms. Parent material: This refers to the mineral material, or organic material from which the soil is formed.
Nigeria is very hot, if you see pictures of Nigeria you can see how the sun is shining very brightly on the houses and on people. Their color of their skin are adapted to support the sun hot temperature.
Europe and America used slaves for labor so the slaves in America or Europe are subtracted from the South African population.