Desert sand dunes are created through the processes of and . A) wind and water.
B) erosion and deposition.
C) freezing and thawing
D) physical and chemical weathering.

B. Erosion and deposition

Explanation:

First you can eliminate A. because there isn't much water in a desert.

You can also eliminate C. because deserts are not cold enough to freeze.

Finally you are left with B. and D. Since there is not many chemicals in a desert you can eliminate D.

So you are left with B.

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explanation: