What is the definition of human migration?

The definition of human migration is best captured by the choice that describes it as the seasonal or long-term movement of humans from one area of the Earth to another. This definition encompasses the various reasons that people migrate, such as economic opportunities, environmental factors, conflict, or social factors. It emphasizes both the temporal aspects (seasonal or long-term) and the geographical relocations involved, which are essential in understanding the broader patterns of human population movements throughout history and modern times.

The other options, while they refer to movement, do not correctly define human migration. For example, a temporary movement within a city does not reflect the broader geographical changes associated with migration. Similarly, the migration of animals pertains to a completely different topic related to zoology, and relocation for educational purposes is often specific and does not encompass the broader notion of migration affecting various populations.