Which best explains the rise of river valley civilizations?

Which best explains the rise of the first river valley civilizations? Climate changes suddenly made hunting more plentiful. The introduction of farming led to a surplus of crops in flood plains with fertile soil.

Explanation: if you need an explanationSMH!

A river valley civilization is an agricultural nation that dwells beside and draws it's sustenance from a river.

Explanation:

(Hope this helps)

he believed that congress would be better not dealing with "lobbyists", or people who seek to influence (a politician or public official) on an issue, since historically, they had problems with these kinds of people. he thought lobbying produces benefits, but should be carefully monitored.