Earth 's magnetic patterns are used for finding locations by animals that migrate, and earth s rotation and iron core creates a magnetic field much like giant magnet. Given these facts, migratory animals are dependent on what feature of the interior of the Earth for navigation among the following options:
- rotating iron core
 - sense organs
 - food and shelter
 - objects that have mass
 - shield volcanoes
 - magma pipes
 - tectonic plates
 - biodiversity


 

 rotating iron core        