Explanation:

Biomass energy (from photosynthesis) and wind energy (from differential solar heating) are ultimately derived from the sun. Geothermal energy comes from the Earth's internal heat (radioactive decay and residual heat from formation), and nuclear energy comes from the fission of heavy atomic nuclei. Both nuclear and geothermal energy are not directly or indirectly derived from the sun's current energy output. However, nuclear energy is often cited as the most distinct non-solar energy source in such questions.