Q: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
A:
rotating iron core