How does Congress exercise control over the federal bureaucracy?

Congress exercises control over the federal bureaucracy when it preforms legislative oversight.

Explanation:

It does this through hearings, determines the budget for each agency, and when it uses congressional review to examine bureaucratic regulations. Hope that this helps you and have a great day :)

(d) rivers.

explanation:

civilizations developed around rivers because their waters provided places to hunt and fish. also, as the rivers flooded, the lands around them became fertile. this allowed them to support farming. this is especially true of the nile river, which flooded the same time each year.

the answer is a) high entry costs