Which important contribution to the advancement of civilization was developed in ancient Egypt between 3000 B. C.E. and 2500 B. C.E.? A system for using horse-drawn chariots in warfare.
A system of written communication.
A system for electing government officials.
A system for smelting iron.

the 1 one

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.

i think iowa because you committed the crime there