Final answer:
Geothermal Energy is the inexhaustible energy resource that utilizes Earth's subsurface heat from hot magma or rocks to generate electricity and provide heating.
Step-by-step explanation:
The inexhaustible energy resource that relies on hot magma or hot dry rocks below ground is Geothermal Energy. Geothermal energy draws upon the Earth's internal heat, which is a continuous and renewable energy source. It can be utilized to generate electricity and to provide direct heating.
This type of energy is especially abundant near tectonic plate boundaries, where geological conditions allow for accessible hot magma or hot rocks beneath the Earth's surface. Geothermal energy plants can harness steam produced from the hot underground resources to drive turbines and generate electricity, or use hot water for heating purposes.