Question

which of the following directly contributed to soil erosion on the great plains in the 1930s?
railroads
heavy rains
farming
homesteading

Explanation:

In the 1930s Great Plains (Dust Bowl era), large-scale, intensive farming removed native deep-rooted grasses that held soil in place. This left topsoil vulnerable to wind erosion, directly causing the severe soil loss and dust storms of the period. Railroads, heavy rains, and homesteading were not direct contributors; heavy rains were absent (it was a drought), railroads were infrastructure, and homesteading was the settlement push, not the direct erosive action.

Answer:

farming