Where does the carbon atoms in c6h12o6 originate?

carbon dioxide

Explanation:

Carbon dioxide diffuses from the atmosphere through the stomata across the intercellular spaces to the photosynthetic cells. During the light stage, energy is used to split the carbon dioxide into oxygen atoms and free carbon ions. The carbon atoms then combine with hydrogen and the oxygen atoms to form a glucose molecule.

primary succession begins with a bare rock and ends with a forest secondary succession begins after a natural disaster where there is a temporary setback after a forest fire or local destruction, but the surrounding area can fill in

a. the production of carbon dioxide through the process of photosynthesis