Traveling to and from cities became easier. (I think thats correct)
The U.S. Senate and the House of Representatives
They believe it would be solved by Currency reform.
Answer:
Push-pull theory
Explanation:
Push-pull theory is important to study because it determines the reason to leave a place or attracted immigrants from other places in search of better economic opportunities, social security, etc. The push factors are those which force a population to leave their country and migrate to another place. Pull factors are those which give reason to the population from other countries settle in the foreign country for various reasons.
only the strong will survive this can also be represented by survival of the fittest
hope this helps :D have a good day!