wind erosion then deposition plate movement then deposition wind erosion then water erosion water erosion then plate movement
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Two processes are involved in the formation of a sand dune. Which two processes best describe how a sand dune forms?
Possibilities:
- wind erosion then deposition
- plate movement then deposition
- wind erosion then water erosion
- water erosion then plate movement

wind erosion then deposition