He resigned because he'd already had enough trouble as president. Mainly the Watergate scandal. His plan was for him to step down and if he was arrested the vice president which would then be the vice president would pardon him. Also, if he didn't resign he'd likely be impeached anyway.
Answer:
Child labor was virtually eliminated when, for the first time in history, the productivity of parents in free labor markets rose to the point that it was no longer economically necessary for children to work in order to survive.
The Boston tea party, the formation of the continental congress and boycott of British good.
