What is the main reason people choose to settle in one area and not in another

The main reason would be the environment because of the fact their population is so big, they need enough room for everyone. There's also the connection with having available food source within the environment when the people plan to settle in. There's also the idea of desirable climate which helps them with food sources and allows them to flourish instead of dying off.

this question does't support enough resioning to answer.

can you explain a little further maybe give multiple choice? ?