HURRY BEST ANSWER BRAINLIEST! Who were the four powers that convened at the Congress of Vienna?

Austria, Prussia, Russia, and Great Britain, the four powers that were chiefly instrumental in the overthrow of Napoleon, had concluded a special alliance among themselves with the Treaty of Chaumont, on March 9, 1814, a month before Napoleon's first abdication.2 Jun 2020

Explanation:

food chain i would say only because there is competition on getting food and survival