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)
It was the Great Depression I believe
The effect of the passage of the jones Act on the Philippines was it franted them full independence and self government to the Philippines. The law was enacted in the sixty-fourth United States Congress on August 29,1916 which contained the full declaration of the Philippines' full independence.
I'm not sure, but i think it was the mayflower compact