Final answer:
The movement of molten iron inward to form the Earth's core resulted in the generation of the Earth's magnetic field.
Step-by-step explanation:
The movement of molten iron inward to form the Earth's core resulted in the generation of the Earth's magnetic field. As the molten iron in the outer core moves, it creates electric currents that generate a magnetic field. This magnetic field extends into space and helps protect the Earth from harmful solar radiation. The generation of the Earth's magnetic field is crucial for the maintenance of life on our planet.