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.
Answer:
the transportaion of goods over large bodies of water
Explanation:
The Maine exploded, causing the United States to become involved in the Spanish American War. It was supposed to have a friendly mission, but resulted in a war.
The answer is the <span>esophagus</span>
