Answer: B: magma is near Earth's surface.
Step-by-step explanation:
Geothermal energy is a type of energy that is generated by the heat of the Earth. It is harnessed through the use of geothermal power plants, which use steam produced from hot water and steam reservoirs found below the Earth's surface to generate electricity. Geothermal energy is most effective in areas where there is a high concentration of heat sources close to the surface, such as areas where magma is close to the Earth's surface. In these areas, the heat of the Earth can be more easily harnessed to produce steam, which can then be used to generate electricity.
One of the main advantages of geothermal energy is that it is a renewable and sustainable source of energy. It does not produce any greenhouse gases or air pollution, and it can be used to generate electricity around the clock, making it a reliable source of power. Geothermal energy is also relatively inexpensive to produce and can be used to heat and cool buildings, as well as to generate electricity. However, it is most effective in certain regions of the world where the conditions are suitable for harnessing geothermal energy, such as areas where magma is close to the surface.