Drought in sub-saharan africa is mainly caused by
a) intermittent flooding.
b) lack of vegetation.
c) warm climates.
d) lack of rain.

D) lack of rain.

Explanation:

Geographically this lies in the south of the Sahara region and it consists to do the African nations. And it has a varied type of climate and thus extends for the Saharan region to the savanna belt and the horn of Africa.  Distinctive forest and grasslands are found also in the tracks consisting of the shrublands and the Ethiopian highlands. The Cape region has a diverse type of subtropical and temperate forest and the shrublands owning to the scanty and varied nature of rainfall patterns.

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