Final answer:
Heat from the mantle and outer core causes convection currents inside Earth.
Step-by-step explanation:
Heat from the mantle and outer core causes convection currents inside Earth. The mantle is the layer of the Earth located between the crust and the outer core, and it is responsible for most of Earth's internal heat. The outer core, on the other hand, is the liquid layer beneath the mantle that is composed mainly of iron and nickel. As heat is transferred from the mantle and outer core, it creates convection currents that result in the movement of tectonic plates and other geological processes.
Learn more about Convection currents in Earth's interior