Which type of energy is derived from the earth's internal heat?

Geothermal energy is the correct answer because it is specifically derived from the heat stored within the earth's crust. This internal heat originates from the planet's formation and the decay of radioactive materials, which continuously produce thermal energy. Geothermal energy can be harnessed for various uses, such as heating buildings or generating electricity.

In contrast, solar energy comes from the sun, nuclear energy arises from nuclear fission or fusion reactions, and wind energy is generated from the movement of air caused by atmospheric conditions. Each of these energy types is sourced from different natural phenomena, which is why they do not qualify as being derived specifically from the earth's internal heat.