Why did people in Europe develop this system called feudalism?

When a king lost the support of his magnates, as was common, he lost control of his kingdom. This devolution of power from the king to the count, and from the count to the local lord, is what gave rise to the social-political phenomena known as the "feudal system."

Credit:

the first action that caused many creek indians to turn against william mcintosh was when mcintosh a) supported the united states during the creek war of 1813–1814. b) attempted to stop the sale of creek land to the u.s. government. c) seized control of over 1,000 acres of land belonging to the creeks.

b is the answer i am assuming