The main reason why an author would want to give background information about a setting of a place is:
This refers to the general setting of a place which helps to give extra information about a place or people.
We can see that by describing the inhabitants of a place, it helps to show their general behavior and then the way in which their surroundings and environment has an effect on them.
Please note that your question is incomplete so I gave you a general overview to get a better understanding of the given concept.
Read more about background information here:
https://brainly.com/question/1747907