Was it necessary for the US to drop the atomic bombs on Japan in order to end the war? Why or why not?

Yes it was.

Explanation:

Due to the stong and unbreakable moral of the japanese with years of fighting. the japadense weren't even close to the thought of surrendering with motos like "honnor before death" the only way to stop more casulaties from a devistating land invasion the US had to drop the atomic bombs

to prevent more casulaties on both sides.

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.