the tilling of new soil to produce crops for consumption
Answer: Option C.
Step-by-step explanation:
In the question that has been talked above, the prairie land led to the settling down of more people and for them to develop and industrialize because of the ecosystem of that area. The people who were living on that land, tilled the soil and led to the production of the new crops which served as a source of livelihood for them.
This proved as a great attraction for the people to settle down on that land and develop themselves because of the climatic and soil conditions of that area.