Why are the rivers of Southwest Asia and North Africa so important to life in the region?

Define the word imperialism. what is your opinion: should the u.s. engage in imperialism? under what circumstances? offer a brief, effective argument against the opinion that you hold.

What was an important consequence of the neolithic revolution? ):

Does anyone know why the second great awakening occurred? (i need an answer asap because this is a question on my assignment! < 3 : ))