Final answer:
In the 1830s, John Deere's plow, McCormick's reaper, and thresher inventions revolutionized farming and expanded settlement in the Midwest.
Explanation:
John Deere's steel-tipped plow, McCormick's reaper, and McCormick's thresher were inventions of the 1830s that played key roles in overcoming difficulties in farming and expanding settlement in the Midwest. These inventions significantly increased agricultural productivity by mechanizing planting and harvesting processes, allowing for more efficient farming methods and contributing to the growth of settlements in the region.
Learn more about 19th-century farming inventions in the Midwest here:
https://brainly.com/question/21683910
