Answer:
Checks and Balances
Explanation:
Checks and Balances is the process that makes it so that no branch of government has too much power and the need to refer to senate before making treaties helps keep the presidents power in chec so therefore it is C.
Appropriate level of formality
That would be Sam Houston
I don't understand the question, but enlightenment thinkers wanted to apply the rules of nature to give people's basic rights (life, liberty and the pursuit of happiness).
It may get weaker or stronger depending on laws , legislation, war ,and economics.