Final answer:
Wind is the primary force causing erosion in desert areas, shaping the landscape by transporting and eroding sand and other particles.
Step-by-step explanation:
The force that causes most of the erosion in desert areas is wind. While gravity, ice, and running water also contribute to erosion in different environments, in deserts, where there is very little rainfall and ice is almost nonexistent, wind plays the most significant role.
Windstorms can transport sand and other particles over large distances, shaping the landscape by eroding softer rock formations to create unique desert features like yardangs, which are streamlined hills formed by the directional erosion of rock by wind.