Why did feudalism develop in Western Europe in the 500s after the decline of the Roman Empire?

Which events are correlated but do not necessarily have a causal relationship?

The line dividing regions 4 & 5 on this map is known as the "fall line." which of these represents an important factor of the fall line in georgia history? a) it was the first boundary of the georgia after it became a state. b) it was an important source of power due to a change in elevation. c) it was once home to major cities that have since become abandoned. d) it was a dividing line between the united states and native american territories.

The television had many impacts after it's invention. which of the following describes impacts of television? -brought people together -allowed people to see others-people saw america as the land of plenty- all the above