water flowing in a riverbed a wave crashing on a beach an earthquake cracking a road wind blowing against a mountain
I gave my students this multiple choice question: Penny's class was learning how rapidly some changes can happen on Earth. Which event causes the fastest change to the surface of Earth?

Only one answer is correct among these 4 choices:
- water flowing in a riverbed
- a wave crashing on a beach
- an earthquake cracking a road
- wind blowing against a mountain

Could you tell me which one is correct?

an earthquake cracking a road