Climate changed colder and wetter,people weakened by hunger and were led to diseases
Because it was called like this:) :):):):)
A) Railroads
Railroads helped to transport resources, manufactured goods, and people all over North America, greatly speeding up the industrialization of the entire continent, especially the United States. Where as industrialization previously existed mostly along coastal cities where materials could quickly be shipped to and from industrial centers, the entire continent was now much more easily accessible for this.
The 33rd prestident was Harry S. Truman
