Answer:
The purpose of a map scale is to help the user to know the distance between 2 or more cities or geographical elements.
I am not completely sure, but I think it might be B, Migration out of a stage 3 or 4 country is higher than migration to it.
I'm pretty sure that it's A, a little higher because most of the lava runs down the sides of the volcano.
Human trafficking is illegally transporting PEOPLE from one place to another, state to state or country to country. The majority of human trafficking is forced labor, which is usually sex-trafficking.
I hope this helps!