Answer:
C. Wind
Step-by-step explanation:
Hot, arid climates, such as deserts are prone to rigorous erosion by wind.
These climates have no vegetation cover and barely no trees. This makes them exposed to wind action. We also know that precipitation all year round is very low and erosion by water would be near impossible.
Most of the surface features of deserts like dunes, Yardangs, Brachans all points to rigorous wind erosion over a long period of time.
The amount of loose sands on surfaces of deserts also makes its easy for the effectiveness of wind erosion in those climatic regions.