The energy which is not derived from the sun is: A. biomass B. fossil fuels C. nuclear energy D. geothermal energy

Let's analyze the options:
A. Biomass:
• Biomass energy comes from organic materials, like plants and animal waste. The energy in biomass originates from the sun, as plants harness solar energy during photosynthesis. Therefore, biomass is derived from the sun.
B. Fossil Fuels:
• Fossil fuels (coal, oil, and natural gas) are formed from the remains of ancient plants and animals. These organisms originally derived their energy from the sun through photosynthesis. Hence, fossil fuels are indirectly derived from the sun.
C. Nuclear Energy:
• Nuclear energy is produced by the process of nuclear fission, which involves splitting the nucleus of atoms (such as uranium or plutonium). This process does not rely on solar energy. Therefore, nuclear energy is not derived from the sun.
D. Geothermal Energy:
• Geothermal energy comes from the heat stored beneath the Earth's surface, which is primarily generated by the Earth's internal processes and radioactive decay. This energy is not directly derived from the sun.
Final Answer:
The energy that is not derived from the sun is C. nuclear energy.