Geothermal energy is the energy that is stored inside the deep layers of the earth. The energy is produced in the form off heat energy, harnessed by the extremely high temperature and pressure on the rocks and water. The example of geothermal energy is hot spring. The hot water emerge out from the earth crust. Geothermal energy is utilized for the generation of electricity and in thermal power plants as energy source.
Geothermal energy is the energy derived from the Earth's crust. There is continuous generation of heat by the Earth's core. This heat is generated by the radioactive decay of the core from when the Earth formed. This heat can be used to make steam and generate electricity. Majority of the geothermal activities can be seen near the tectonic plate boundaries.
The answer is geothermal energy. This energy can be harnessed to generate electricity. The energy emanates from the deep core of the earth due to the radioactivity of the rocks in the region. The radioactivity heats Magma from the mantle which subsequently heats the rocks and fluids in the earth crust.