Why does Earth have magnetic poles?

Answer: Molten iron core circulation

Molten iron core circulation ✓ — Correct! Earth's outer core is molten iron and nickel. As Earth rotates, convection currents flow through this liquid metal, generating electric currents. These currents create Earth's magnetic field (geodynamo effect). The magnetic poles don't align exactly with geographic poles and even flip every 200,000-300,000 years!

Frozen magnetic rocks — Wrong. Rocks can preserve magnetic signatures but don't generate the field. Earth's magnetism comes from circulating liquid metal in the core.

Solar wind creates field — Wrong. Solar wind interacts with Earth's magnetic field (creating auroras), but the field itself is generated internally by core dynamics.