Federalist No. 51, titled: The Structure of the Government Must Furnish the Proper Checks and Balances Between the Different Departments, is an essay by James Madison, the fifty-first of The Federalist Papers
The correct answer is the second one
1) The correct option is "Mesoamerica"
2) The correct option is "<span>The Swahili people were primarily pastoralists.</span>"
I may be wrong but i read that if the annual nile floods were to low it could cause drought and they would starve.