Over population is caused many people moving there for business and not enough leaving and or space or job shortage it leads to crowding and shortages
Answer:
https://en.wikipedia.org/wiki/Scramble_for_Africa
Explanation:
There were<span> many </span>effects<span> on the people living or coming to the United States because of the </span>transcontinental railroad<span>. Native Americans </span>were<span> affected negatively and settles and immigrants </span>were<span> affected positively. Mixed emotions led to be a problem for some time to come
Hope this helps!! (If not sorry!)</span>