What is the process represented by this diagram

Photosynthesis

Explanation:

The process described in the image attached to the question above is PHOTOSYNTHESIS, which is the metabolic process whereby plant cells manufacture their own food in the presence of a light source (sunlight) for energy. Photosynthesis occurs in the chloroplast of plant and algae cells.

Photosynthesis occurs in two stages namely; light-dependent stage and light-independent stage. The light dependent stage synthesizes ATP and NADPH molecules needed by the next stage to produce sugars.

According to the image portrayed in this question;

- Letter A represents the LIGHT ENERGY source.

- Letter B represents WATER while K represents OXYGEN gas given off

- Letter F represents thylakoid lumen where the first stage occurs while letter G represents the stroma of the chloroplast where second stage occurs.

- Letter C represents carbon dioxide (CO2) while letter L represents glucose molecule.

i believe it is "they are not used up by reactions" as the answer to your question, text me back if this is correct because i just learned this.