migration
migration
Migration is made possible through behavioral adaptations. An animal typically migrates to find food, escape drastic seasonal changes, or to mate.
The mass migration to California was spurred by a natural disaster. In the mid-1930s a severe drought stuck the Great Plains. Winds picked up the topsoil that had loosened and dried, turning 50-million-acre region into a wasteland.
earthquake
What two effects of the migration of people through Africa
ducks
migration
...
Population decreases
migration
wildlife
Animal migration or Migration in animals
rural-urban migration
There is no migration in Antarctica: it is not home to any animal.
Innate behavior
Three causes of human migration are economic opportunities, political instability, and environmental factors. Three effects of human migration include cultural diversity, demographic changes, and strain on resources in receiving countries.