The choice that best describes the push-pull nature of human migration is:
While some people are pushed out of a place due to war or famine, other people are pulled towards a place because it offers more safety or economic opportunity.
This response effectively captures the core concept of push-pull factors in migration, where "push" factors (such as war or famine) drive people away from a location, and "pull" factors (such as safety or economic opportunities) attract people to a new location.