Match these items.

1. wanted to establish an abolitionist republic
john brown
2. sued for his freedom
harriet tubman
3. underground railroad
fort sumter
4. clay's plan to end sectionalism
lecompton fraud
5. surrender began civil war
american plan
6. won 1860 presidential election
abraham lincoln
7. proslavery constitution in kansas
dred scott

Dred Scott with Bleeding Kansas/ proslavery constitution in Kansas 

while it was true that the cotton gin reduced the labor of removing seeds, it did not reduce the need for slaves to grow and pick the cotton.

explanation:

before eli whitney's invention of the cotton gin, picking and cleaning cotton was a slow, labor-intensive job. workers, usually slaves, had to pick the seeds from the cotton fibers by hand. this invention made it possible to grow large amounts of cotton on big farms and make money.