Which of the following directly contributed to soil erosion on the great plains in the 1930s?
a. railroads
b. heavy rains
c. farming
d. homesteading

I believe the answer is: C. Farming

In order to create a farming business, people at tend to need to create a space for the field, which obtained by going into a forest and cut down the trees so they can create a space. When they do this, the thing that maintain the strength of soil's structure is gone, which overtime would lead to erosion.

b toward the volcano.landward. the landward side of something is the side nearest to the land or facing the land, rather than the sea.

can't without checkbox