How did the invention of the cotton gin affect slave labor in the united states? there was a forced migration of slaves from the south to the north. slave-owning cotton planters were gradually forced to sell their plantations. more slaves were purchased to work on cotton plantations in the south. the reduced need for labor on cotton plantations led to a decline in slavery. slaves were moved from cotton plantations to sugar plantations.

The answer is:

C - More slaves were purchased to work on cotton plantations in the South.

- "made the south's economy grow rapidly and a small effect that a lot of people don't know is that it made the more demand of slaves and cotton products. and also new states formed due to plantations growing in size."

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answer: the correct answer is d. a christian revivalist movement in the u.s. during the early 19th century

explanation: the second great awakening was lead by the preachers of baptist and methodist congregations in order to gain support for the protestant religion from the 1790's to 1840's