Pls helppp me with these questions

4. Cotton Gin harvested cotton
5. Because the cotton gin could harvest so much more, cotton farmers would buy and work more slaves for more profit.

6. A few major ones were immigration, making railroads, and using tariffs to ward foreign countries away from competing with the American market.
7. Industrial Revolution, I think the answer they want you to give is being blocked off from trading with England and France.

Dpolitical is the answer