South africa and east africa
1) ~ Answer is D ( Erosion). In earth science, erosion is the action of surface processes (such as water flow or wind) that removes soil, rock, or dissolved material from one location on the Earth's crust.
4) ~ Answer is A ( rock wearing down due to acid rain)
11) ~ Answer is C, there was no life during that period of time.
I believe the answer to be CA, I'm not 100%.
Packet Sniffer...........
It is a transitional eco region of a semi-arid grasslands ,savanna’s ,steppes and thorn scrublands. It lyes between the wooded sudanian savanna to the south and it’s on the Sahara to the north. The Sahel’s topography is mainly a flat land.most of the region lies between 200 and 400 meters in elevation.it also borders south Saharan steppe and is in Senegal , Mauritania
