Answer: B. Geothermal
Explanation:
Volcanic eruption can be define as a drastic event in which heat, gases and molten magma expel out of the volcanic site with the explosive sound. This results due to development of underground heat and pressure inside the mantle.
Geothermal is the correct option because of the fact that with the volcanic activity the underground water present in the geosphere also comes out from the hot springs. It is a renewable source of energy because it can be occur in future and the volume of the water is large enough to meet the thermal energy needs for the future generation as well.
