Q: You are presented with the quiz "Rain causes the breaking apart and moving of rocks and what?"   But you don't know the answer, so you turn to your teacher to ask for hints. He says that "rain causes erosion" and "erosion is the breaking apart and moving of rocks and soil".   So, what's the best answer to the question?

Choose from: * abrasion. * soil. * sand. * reservoirs. * earth. * broken. * ground. * Roads.
A:
soil