Q: Birds flying thousands of miles south in the winter, then returning to their homes in spring, is a familiar example of what?


Read this paragraph and choose the correct option from the provided answers:

One type of migration that you are probably familiar with is the migration of birds. Maybe you have heard that birds fly south for the winter. In the fall, birds fly thousands of miles to the south where it is warmer. In the spring, they return to their homes. ( Figure below ).

 Choices:

- hibernation

- evacuation

- emigration

- migration


A:
migration