Answer:
More and more land was cleared for farming during this time.
Step-by-step explanation:
The great plains refers to the area across the North American continent that possess several characteristics such as: Large area of grasslands, highly nutritious soils and close proximity to water sources.
This made it easy for wide variety of crops to be grown in the Great Plains.
As a result, settlers came to this area and started clearing a lot of lands for farming purposes. As the number of farm grew, the amount of food stocks that exist in that area also increase. This made it easier for human to survive area and lead to a significant population growth.