I think D .....................
I think that the correct answer to this question is C .
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.
