runoff from a river. weathering by waves. erosion of rock debris. a buildup of cooled lava.
I gave my students this multiple choice question: A plateau is most likely formed by

Only one answer is correct among these 4 choices:
- runoff from a river.
- weathering by waves.
- erosion of rock debris.
- a buildup of cooled lava.

Could you tell me which one is correct?

a buildup of cooled lava.