The correct answer is - pull factors.
The increased freedom and much more employment opportunities in the United States can be considered as pull factors. They can be considered as pull factors because they are big reasons why people from all around the world got attracted to the idea of migrating to the United States, as they saw a nice chance to prosper and have a better life. Most of the countries were still struggling with the freedom issues, and the employment opportunities were either very limited, or badly payed, so no wonder that pople wanted to move in the United States.
<span>Atahualpa was the leader of the Incan empire when the spanish arrived.</span>
Explanation:
iran student uprising led to overthrowing of the Shah of Iran
and the installing of the cleric ayatollah Khomeini as the supreme leader
students blamed America of keeping the Shah in power so they took over the American embassy and held the employees there hostage for over 400 days