The picture of Manifest Destiny shows A. the light of civilization dispelling darkness

B. the train bringing technological advancement

C. Native Americans and animals fleeing

D. all of the above

Two books are used to model tectonic plates

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

What is the main idea of this excerpt