Which of the following directly contributed to soil erosion on the great plains in the 1930s?

Drought caused by sparse rainfall, hot summers, and high winds predominantly led to the soil erosion in the Great Plains during the 1930's. Human factors such as over farming, and complete uprooting of plants left nothing to ground the sandy soil. This combined with the high winds caused large amounts of particulate to be picked up and blown away from the area leaving it barren.

The transcontinental railroad provided a means of fast transportation. it cut a 6 month trip into 6 days, created jobs for many people and encouraged immigration. the homestead act played a huge role in western expansion; it allowed settlers to begin a fresh start, and gave them land in exchange for their residence for up to five years and a small fee.