Railroads helped the US grow by making settlement in the West possible after the Civil War by connecting farmers (miners, ranchers, loggers, and others) to markets. there people and companies could both ship their produce to markets as well as ship in the machinery and supplies they needed. It was the only way to move large amounts of things quickly.
Answer:
The Yellow River Valley also known as the Huang He
The Organization of Petroleum Exporting Countries unites countries extracting petroleum that are involved in the Middle East, since no western states are members.
4.27% of the world is from the U.S.A
