Support a large population, which eventually formed into cities
Answer: Economy
Explanation:
Much like in politics, war is usually decided by money. Who has enough money to finance the war campaign such that their soldiers can get the best equipment and means to keep up the war effort.
The North had that advantage over the South and other advantages flowed from this. With a superior economy which was based on industry and finance, the North could levy taxes and collect more money from their people than the South could.
With this money they were able to buy better guns, better equip their navy, supply food to their soldiers and transport them around on railroads as well. The economy of the North made it such that they had a resource advantage over the South and they used this to their advantage from the mid to the late stages of the war.
During the 1920s, which were also known as the roaring 20s, the stock market went up alot in that time frame. The stock market went up a lot until October 29th when the market crashed.
A) Silt deposits from river flooding made the soil more fertile.
Well, I liked that they became allies in the end
