Question

to help combat blowing sand, the soil erosion service and the prairie states forestry project put many men to work doing what?
a. planting trees.
b. digging ditches.
c. spraying water on the soil.
d. none of the above.

Explanation:

Trees can help combat blowing sand by providing windbreaks and stabilizing the soil. Digging ditches and spraying water on the soil are not typical primary methods for combating blowing sand in such a context.

Answer:

A. Planting trees