A Wildlife Biologist in South Africa Notes That the Soils

A wildlife biologist in South Africa notes that the soils on south-facing slopes are wetter and deeper than those on north-facing slopes, and therefore support more wildlife. What likely accounts for this difference?

A) differences in rainfall from one area to another
B) more rapid plant growth on the south slopes
C) higher soil temperatures on the north slopes
D) more solar radiation on the south slopes
E) sandier soils on the north slopes