Q: You are presented with the quiz "Earth's magnetic patterns are used so that birds can fly along their what?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "earth 's magnetic patterns are used for finding locations by animals that migrate" and "animated maps show the birds flying along their actual migration paths". So, what's the best answer to the question?

Available choices:
[-] migrating pain.
[-] migration paths.
[-] our nearest star.
[-] flying schedule.
[-] Something to move.
[-] travel plans.
[-] important habitats.
[-] their hosts.
A:
migration paths