Explanation:
Interior Migration happens when someone moves from one part of their country to another. Immigration is where you move from your country to another country.
Answer:
There is a brainial difference
Explanation:
They brain doesnt think like ours does because we can wait stop and think unlike an animal that just has insticts and just acts which can lead to bad things.
For the answer to the question above, the obstacles that an immigrant he/she might need to overcome are,
Leaving friends
Leaving family members
Embracing new Religion especially if you are migrating to Eastern Country or where the majority's religion is Muslim.
Finding the way around the city
and maybe learning the new language because you don't know if the stranger is already mad at you if you don't understand what is he talking about.