The role of the ohio river was very important because it provided resources for the different nations.
It was the "Open Door Policy" that was the name of the trading policy that Secretary of State John Hay initiated with China and the European nations that already had a presence there, since the US wanted to benefit from trade with China as well.
Indeed it is sir, can you help with my questions ?
Answer:
The segregation of wealthy suburban neighborhoods outside of metropolitan areas.
Explanation: