Answer:
the 3 estates: clergy, nobility, and the others/commoners
The missisipi river formed western boundary
I think the mexican war where we took land from the mexico or the illiouisiana purchase
Reduced dependence on nonrenewable resources
Our dependence on fossil fuels has actually increased dramatically as more and more people own vehicles. Vehicles are becoming more efficient, but with so many on the road at once, we're burning through our nonrenewable resources fast. It may not happen on our lifetimes, but we'll run out eventually and unless we find a better source of energy by then, we'll be in a bad situation.
The final solution during World War Two was hitlers plan for mass extermination of the Jewish people by using the gas chambers where he could kill ultimately millions of Jews and other minorities.