The most important economic development in the mid-19th-century south was the cotton gin.
The main factor that influenced African Americans to migrate from the South to Northern cities was that they were looking for better economic opportunities.
The Great Migration, also known as the Great Northward Migration in the 20th century, happened because most black people were badly treated by many people that still expected African Americans to be slaves, and their economic conditions were quite poor.
As a result, African Americans decided to migrate to the Northern cities, where they would get many job opportunities as well as going to have a better lifestyle by not being discriminated.
Answer:
In the early 1800s, mass production was made possible by the use of a series of inventions which made it possible to use a few amounts of energy to produce an unprecedented amount of products
Explanation:
