What are two features that form though wind deposition?

The correct answer is sand dunes and loess deposits.

Explanation:

A geological procedure in which soils, sediments, and rocks are supplemented to a land mass or landform is known as a deposition. Ice, water, wind, and gravity carry previously weathered surface substances that at the expense of adequate kinetic energy in the fluid gets deposited, accumulating the layers of sediment.  

In case of wind deposition, all the sediments taken up by the wind finally falls back into the ground. This takes place when the wind gets trapped by some kind of obstruction or becomes slows down resulting in trapping of the windblown sediments of sand. The deposition by wind results in the formation of loess deposits and sand dunes.  

i'm assuming that the correct answer is indeed the first one/ "a"..