Please help me I’ll mark you branliest ;(

Cotton gin.

Explanation:

Although the creation of cotton gin changed the United States forever, it had led to a growth of slavery. Due to the amount of profit in cotton gin, the American South had a demand for both land and slave labor. Cotton harvesting demanded slaves. Slaves grew and picked cotton.

the only true answer is that it expanded after 325 ad.

the space race was a battle to make advanced technology to get to the moon and to get a better understanding of space.