What are 3 reasons why the U. S. was able to
industrialize so quickly?

The use of machines in manufacturing spread throughout American industry after the Civil War. With machines, workers could produce goods many times faster than they could by hand.  The nation's abundant water supply helped power the industrial machines. Forests provided timber for construction and wooden products.

Explanation:

while it was true that the cotton gin reduced the labor of removing seeds, it did not reduce the need for slaves to grow and pick the cotton.

explanation:

before eli whitney's invention of the cotton gin, picking and cleaning cotton was a slow, labor-intensive job. workers, usually slaves, had to pick the seeds from the cotton fibers by hand. this invention made it possible to grow large amounts of cotton on big farms and make money.