Along with the spin of the along with the spin of the earth, what causes its magnetic field? the presence of magnetic rock layers in the lithosphere the partially melted rocks of the asthenosphere the movement of molten rock in the outer core the use of compasses on the surface of the earth

The source of Earth's magnetic field is the molten iron and metals in the earth's core. The spinning of these liquid metals produces the same effect as electric current in a coil which produces a magnetic field.

the presence of magnetic rock layers in the lithosphere

Explanation:

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fumikage isn't really a bird, and tsuyu does have teeth. tsuyu has a transformation quirk which still allows her to be partially human. otherwise we'd have a large frog running around. fumikage has teeth because again, he isn't a bird. his head was a quirk mixture if i'm correct.