Why does heat from the Earth's center to the surface?

Heat from the Earth's center to the surface is primarily generated by the decay of radioactive isotopes and residual heat from the planet's formation. This heat moves upward through processes like conduction and convection in the mantle. Convection currents in the molten rock facilitate the transfer of heat, while conduction occurs in the solid parts of the Earth. Ultimately, this heat influences geological activities, including volcanic eruptions and tectonic movements.