I swear it's the cell membrane.. I'm not sure though
Answer:
Photosynthesis, the process by which green plants and certain other organisms transform light energy into chemical energy. During photosynthesis in green plants, light energy is captured and used to convert water, carbon dioxide, and minerals into oxygen and energy-rich organic compounds.
Cells are the smallest biological unit of life found in all organisms. Cells are sometimes referred to as the “building blocks of life”.
There you go!