What are two important functions of Earth's magnetic field?

Here are two examples of the importance of Earth's magnetic field:

1. The Earth's magnetic field protects the planet from harmful solar radiation and cosmic rays by deflecting charged particles, preventing them from stripping away the atmosphere and harming living organisms.
2. It is essential for navigation, as it allows compasses to work by aligning with the magnetic field lines, guiding ships and aircraft. Many animals also use it for migration.