The answer is rumination. This is the centered consideration around the indications of one's pain, and on its conceivable causes and results, instead of its answers. Both rumination and stress are related with nervousness and other negative passionate states; in any case, its measures have not been bound together.
I think that railroads helped because people could get their goods faster and people could send out more goods across America.
A- because there are colder temperatures in the winter months in the northern states