Answer:
B. desertification caused by poor agricultural practices
Step-by-step explanation:
I don't think it A because there aren't many shopping centers and restaurants in Africa.
I don't think it's C because there aren't that many factories in Africa.
I don't think it's D because erosion of coastal areas only are near the border of Africa.
I think its B because Africa is largely becoming overpopulated and as such needs resources to sustain its growing population. But in Africa largely, the Agricultural methods practiced is not sufficient enough to cater for its growing population. Hence causing desertification (Process by which a geographic region becomes a desert. The change may result from natural changes in climate or by HUMAN ACTIVITY.)
Sources: Google