Final answer:
The invention that allowed farmers to cut their grain more easily and cheaply in 1834 was the reaper.
Step-by-step explanation:
The invention that allowed farmers to cut their grain more easily and cheaply in 1834 was the reaper. The reaper was a horse-drawn machine that used revolving blades to quickly cut the grain, making the process more efficient and cost-effective for farmers. This invention revolutionized agriculture by significantly reducing the labor needed for harvesting crops, enabling farmers to increase their productivity and meet the growing demand for grain.
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