Which statement about photosynthesis is true?

• A. Light energy to chemical energy
• B. Chemical energy to mechanical energy
• C. Light energy to electrical energy
• D. Chemical energy to light energy

Answer: (A)

Photosynthesis takes light energy from the sun and stores it as chemical energy in sugars. Chlorophyll and other pigments capture light, driving reactions that form ATP and NADPH. Those energy carriers then power the synthesis of sugars from carbon dioxide, so the energy ends up in chemical bonds. This is why light energy to chemical energy is the correct description.

The other ideas don’t fit because photosynthesis isn’t about turning chemical energy into motion (no mechanical work is produced in this process), it doesn’t generate electricity as a primary product, and it doesn’t convert chemical energy into light energy (the input is light, not stored chemical energy).