Question

What invention most helped to make the shift to large plantations throughout the Deep South profitable?

Answer 1

The  invention of the cotton gin by Eli Whitney played an important role in propelling the Southern cotton market to worldwide prominence. This invention facilitated to the growth of cotton culture, especially in the Deep South where cotton became a very profitable crop.

Answer 2

The invention that helped was the

Cotton Gin

It is a machine that is used to separate cotton from the seeds