Question

which of the following substances could be letter \a\?
water
sunlight
oxygen
glucose

Explanation:

The image shows a diagram related to photosynthesis (in the chloroplast, labeled G) and cellular respiration (in the mitochondrion, labeled H). Photosynthesis uses water (\(H_2O\)) and carbon dioxide (\(CO_2\)) as reactants (along with sunlight, labeled F). Among the options, water is a reactant for photosynthesis. Sunlight is already labeled as F. Oxygen is a product of photosynthesis (could be a product moving to cellular respiration, but not A). Glucose is a product of photosynthesis (not a reactant for the process starting at A in the diagram related to photosynthesis input).

Answer:

Water