Answer:
Weathering involves the use of water and or wind to wear down the environment. The sand dunes were most likely carried by wind to form them and form its shape. Erosion most likely took away parts of the sand to make the sand dune. Deposition most likely deposited sand to the area.
Step-by-step explanation:
If you possibly want a better explanation, try looking it up :).
#teamtrees #WAP (Water And Plant)