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.
<span>Ethnicity is mostly based upon the geographic location of one's ancestors, but it should be noted that this is a complex topic and there are other factors as well. </span>
Answer:
A. millions of American men showed up at draft boards across the county to volunteer for the war
Explanation:
At first U.S. stayed neutral and viewed World War 1 as a civil war in Europe. However, when Woodrow Wilson became the 28th U.S. president in 1913, he sided with United Kingdom and sent them material aids and this made the Germans angry. In May 7th 1915, there was the Sinking of the RMS Lusitania by a German U-boat. British ocean liner RMS Lusitania, which primarily ferried people and goods across the Atlantic Ocean between the United States and Great Britain. Of the 1,949 people on board, 1,313 died, including 128 Americans. This aroused a wave of indignation in the United States and in 1917, U.S. government decided to enter the war.
Hope it helped you a lot!
