Fact 1: Earth 's magnetic patterns are used for finding locations by animals that migrate.

Fact 2: Animated maps show the birds flying along their actual migration paths.

Given the two facts above, answer the question "Earth's magnetic patterns are used so that birds can fly along their what?" with the following options: 
- migrating pain
 - migration paths
 - our nearest star
 - flying schedule
 - Something to move
 - travel plans
 - important habitats
 - their hosts


 

  migration paths       