Which statement about Earth’s core helps explain Earth’s magnetic field?

Question

Earth’s core is composed of magnets.
Earth’s core is composed of iron and nickel.
The outer core is solid.
The inner core is liquid and moving.

Answer 1

The statement that helps explain Earth’s magnetic field is:

Earth’s core is composed of iron and nickel.

The movement of molten iron and nickel in the outer core generates electric currents, which in turn produce magnetic fields. This dynamo effect is responsible for Earth’s magnetic field.