Hello there! The cotton gin would be your answer :)
During the pre-civil war era, cotton was extremely hard for slaves to do by hand, and slowed down production of cotton. This machine, created by Eli Whitney and helped speed the process of collecting cotton which dramatically increased the profit of Southern plantations.
I hope this helped! If you have any more questions just comment or message me :) I can give a more in-depth lesson about the effects of the cotton gin if you'd wish. Good luck with school!
Here's a picture showing how the cotton gin works (found on slideshare.net)
Most of Africa is hot, so I'd say climate change
Commodore Perry and Japan (1853-1854) Asia for Educators. Columbia University. On July 8, 1853, Commodore Matthew Perry of the United States Navy, commanding a squadron of two steamers and two sailing vessels, sailed into Tôkyô harbor aboard the frigate Susquehanna.
Answer:
negotiators were brought to the White House until an agreement regarding the railroad strike was met
I hope this helps!
Explanation:
