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Answer: Farming
Explanation:
The Great Plain is a large area of flat land in North America. Due to it being a huge vast of land, it typically supports farming and cattle ranching and this contributed to erosion that is, when the top surface of the land is being washed off.
Therefore, the option that directly contributed to soil erosion on the Great Plains in the 1930s is farming.
The major source of conflict between President John Adams and Vice President Thomas Jefferson was that Thomas Jefferson opposed the Alien and Sedition Acts passed by the Federalist Congress, because towards the elections of 1796 the candidate that won the elections was the Federalist John Adams, and the Democratic-