Erosion happens when rocks and sediment are picked up and moved to another place by water, pause wind pause ice pause and even gravity
Erosion can occur slowly over time like a sand dune or quickly like a flood
There several methods of erosion.
Remember, weathering breaks down the rock, and erosion moves the rock away
Rainfall can cause erosion and wash sediment away
Valley erosion occurs when rushing streams and rivers move rocks and sediment downstream
Oceans are a huge force of erosion
The wind is can cause erosion
A dust storm can be a huge force of erosion
Picture Duststorm
Corporal Alicia M. Garcia, U.S. Marine Corps., Public domain, via Wikimedia Commons