Answer:
D. inside Earth is the correct answer.
Step-by-step explanation:
Geothermal energy come from inside Earth.
Geothermal energy comes from the heat inside the earth, heat utilized for generation of geothermal energy comes from the molten rock termed magma below the earth's crust and When heat is carried to the water, geothermal energy is created.
Geothermal energy is a renewable energy resource.
Geothermal energy is used to generate electricity, to warm buildings, greenhouses, and for different purposes.