What is the example of a pull factor for coming to the United States

There are many opportunities for employment, from serving in a restaurant to becoming a nurse.

Explanation:

When it comes to migration, all of the factors are divided into two groups - push factors and pull factors. Push factors are the ones that make people move away from someplace, while the pull factors are the ones that attract people to move into someplace. Generally speaking, the pull factors are in abundance in the most developed countries, while they lack in the least developed countries.

In this case, a pull factor toward the United States would be that if you move in you will have countless opportunities. Practically, you can start off as a waiter, but if you have quality and determination you can end up in the position you desire over time. This is very important for the majority of the people, as in a lot of countries, despite the qualities and hard working ethic, people are simply stripped of the opportunity to progress and have a better life.

answer; (d) melting of sea ice;