Two methods used to control annual floods were a. reservoirs and dams c. irrigation and canal use b. reservoirs and irrigation d. dams and canal use,

a. reservoirs and dams

A reservoir refers to an enlarged lake or pond, whether natural or artificial, created to store water. Reservoirs are usually created by controlling a river that drains into a body of water. On the other hand, a dam is a barrier that restricts the flow of water. Both of these methods are used to control floods, but also to provide water for human consumption, irrigation and industrial use.

answer; if congress didn't act on certain requests;

mali had been a state inside of the ghanaian empire. after ghana fell because of invading forces and internal disputes, mali rose to greatness under the leadership of a legendary king named sundiata, the "lion king." the songhai empire, already weakened by internal political struggles, went into decline.