What was the important advantage that the North had during the Civil WAR

During the Civil War, the North had a larger population, greater access to the navy, more industrial power and better access to gunpowder.

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.

number 1 is a)