Answer:
It increased the demand for slave labor to grow cotton.
Explanation:
Eli Whitney created the Cotton Gin, a simple machine that separates cotton fibers from their seeds. Before it, this separation needed to be done by hand which made production slower.
With the invention of the Cotton Gin, the productivity of cotton grew, it actually doubled each decade after 1800. With production rising, cotton farms needed more and more slaves to produce cotton, and because of this, it increased the demand for slave labor.