What was one of the primary results of chinese civilization settling in river valleys

Well from what I learned they nearly got wiped out at one point but it was great for agriculture, they grew rice and other plants but they had much flooding

Probably the primary result of Chinese civilizations settling in the river valleys was that they were able to produce more crop produce this way than if they would stay at another place. Doing this, they were able to sustain themselves relatively easily compared to other towns and nations.  

In my honest opinion , i’d say franklin d roosevelt was a president that impacted our nation , i say this because fdr is voted among top three best us presidents and he was the longest serving president by 3 terms , usually presidents only supposed to have two terms increments of 4 years , equivalent to 8 years total before election time. and he established the fdic , through the 1933 banking act and he established the us , social security system , during his presidency, and established a national minimum wage , through the fair labor standards act , fdr led the allied coalition to victory in wwii and he played a major role in the creation of the united nations.