Explain the cause for movement from river valley civilizations to early industrial centers.

The correct answer to this open question is the following.

The cause for movement from river valley civilizations to early industrial centers was natural disasters such as floods or earthquakes as well as invasions from other city-states.

Early civilizations established next to rivers for the many advantages it represented. After many years of being nomads, humans learned agriculture techniques, settled in these places and started to grow crops during the Neolithic or Agriculture Revolution. One of the earliest or the earliest civilization registered by historians were the Sumerians. They settled in between the Rivers Tigris and Euphrates. Another important early civilization were the Egyptians that settled in next to the Nile River.

for the 2 countries u can do china and america because america has a democratic government while china has a communist government.

a democracy is a government run by the people either by directly voting or indirectly by electing representatives. an oligarchy is a government run by a few or a small group of people. a democracy and oligarchy are similar because both in an oligarchy and an indirect democracy, a small group of induvial determine the laws for a large group of people they are different because in an oligarchy it is easier to control and they do not have to answer to a large number of people in the country, unlike a democracy where they do have to answer to a large number of people an county that is a democracy would be the united states. a country that is an oligarchy would be the china.