The PUSH-PULL theory is used by scientists to explain?

1) how people fight
2)mountains
3)immigration
4)farming methods

I think #3. Can you check?
Thanks

Right.

To determine if the PUSH-PULL theory is used to explain immigration, you can follow these steps:

1. Start by understanding what the PUSH-PULL theory refers to. The PUSH-PULL theory is a concept often used in the field of migration studies to explain the factors behind people's decision to migrate.

2. Next, consider the factors that contribute to migration patterns. Push factors are the circumstances or events in a person's current location that compel them to leave, such as political instability, conflict, lack of economic opportunities, or environmental disasters. Pull factors, on the other hand, are the circumstances or events in a new location that attract migrants, including better economic prospects, political stability, higher quality of life, or reunification with family and friends.

3. Now, relate this understanding to the options given. While the PUSH-PULL theory is not exclusive to explaining immigration, it is commonly applied to understand migration patterns and choices. Therefore, option 3, immigration, is indeed a suitable answer.

So, to answer your question, the PUSH-PULL theory is used by scientists to explain immigration.