Question

multiple-choice question
the economy of the north was based on paid labor, and the economy of the south was based on slavery. slavery was actually decreasing in the south, until what was invented?
the mechanical reaper
the cotton gin
steam engines.
interchangeable parts
rewatch
submit

Explanation:

The question is about the history of the Southern economy and slavery. The cotton gin, invented by Eli Whitney, revolutionized cotton production by making it easier to separate cotton fibers from seeds. This increased the demand for cotton, which in turn increased the demand for slave labor to grow and harvest cotton, reversing the earlier decline of slavery in the South. The Mechanical Reaper was for harvesting grains, steam engines were for power/transport, and interchangeable parts were for manufacturing efficiency—none of these directly impacted slave labor demand like the cotton gin.

Answer:

B. The cotton gin