Answer:
It increased material wealth, extended life, and was a powerful force for social change. It undermined the centuries-old class structure in Europe and reorganized the economic and philosophical worldview of the West.
Physical features like water bodies, available of trees and many more influences people settlement in communities
That would be survey research.
Surveys are used for the political polls as they are very good and appropriate for this kind of research as they consist of questions that have the aim of eliciting the specific information and data from the people about a particular subject. Surveys can take a wide variety of forms be that a simple phone interview or a kind of online survey.
Answer:
Most connections are on the East Coast.
"The United States has the largest rail transport network size of any country in the world. The nation's earliest railroads were built in the 1820s and 1830s, primarily in New England and the Mid-Atlantic region. The Baltimore and Ohio Railroad, chartered in 1827, was the nation's first common carrier railroad." per Wikiapedia.
Explanation:
https://en.wikipedia.org/wiki/Rail_transportation_in_the_United_States