a drought wind erosion an earthquake water pollution
I gave my students this multiple choice question: A class planted trees and shrubs in an empty dirt lot beside the school. The roots of the plants can help protect the soil. The soil is most likely being protected from what?

Only one answer is correct among these 4 choices:
- a drought
- wind erosion
- an earthquake
- water pollution

Could you tell me which one is correct?

wind erosion