wind and rain. animal movement. crops grown in the soil. increased temperatures.
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: The prairie grass ecosystem once had a deep layer of topsoil which was protected by the grasses that covered it. Removal of these grasses for farmland is causing the soil to be eroded mainly by
Possibilities:
- wind and rain.
- animal movement.
- crops grown in the soil.
- increased temperatures.

wind and rain.