dirt breaking down or collapsed
Yes. Erosion is weathering. It's can apply force but doesn't have to.
The most important and strongest force of erosion is Water.
the driving force for erosion is , when bad things come out of driving that involves erosion.
Erosion
Friction causes erosion through wind or water.
wind is an agent of erosion which causes sheet erosion
erosion
it is moving water
it is moving water
Water
Erosion
Either water or air, depending on where the erosion occurs.