Which energy source is derived from heat stored in underground rocks or water?

Which energy source is derived from heat stored in underground rocks or water?

• A. Wind Energy
• B. Uranium
• C. Chlorofluorocarbons
• D. Geothermal Energy

Answer: (D)

Heat stored underground in rocks or water is geothermal energy. This energy comes from the Earth's internal heat and is found in hot rocks and in groundwater. Accessing it involves drilling to bring hot water or steam to the surface, where it can drive turbines for electricity or provide direct heating. Among the given ideas, this is the one that originates from underground heat. Wind energy uses moving air, uranium relates to nuclear reactions, and chlorofluorocarbons are chemicals, not energy sources. Geothermal energy is renewable and location-dependent, often best where there are naturally hot rocks or reservoirs.

Heat stored underground in rocks or water is geothermal energy. This energy comes from the Earth's internal heat and is found in hot rocks and in groundwater. Accessing it involves drilling to bring hot water or steam to the surface, where it can drive turbines for electricity or provide direct heating. Among the given ideas, this is the one that originates from underground heat. Wind energy uses moving air, uranium relates to nuclear reactions, and chlorofluorocarbons are chemicals, not energy sources. Geothermal energy is renewable and location-dependent, often best where there are naturally hot rocks or reservoirs.