Irrigation systems were used and began to be improved S well so farmers were able to water their crops and not rely on the rain .
Katherine Johnson's knowledge of mathematics was instrumental in the return of the Apollo astronauts from the Moon to Earth.
A melting pot, is a pot into which many different substances are going in, and then as they melt, they become fused with each other, - producing one substance. A melting pot as a metaphor means that the US was to produce a homogeneous society, a mix of all the constituent societies, which, it is to be understood, would be stronger than all the constituent societies by themselves. <span />
Answer:
Alcohol
Explanation:
Prohibition was the ban of all alcohol, and the home-making of alcohol.