produces chemical stability; therefore decreases E
Explanation:
E is generally refers to the activation energy. Activation energy is a type of energy required for the starting of chemical reaction. Atoms are reactive when their outermost shell is incomplete and only be stable when the outermost shell filled with electrons. so for the reaction when the atom is stable activation energy is required but when the atom is stable, there is no need for activation energy.
Photosynthesis and cellular respiration are "mirror images" because they're opposite reactions. In cellular respiration, oxygen is inputted, carbon dioxide is the output, and reverse for photosynthesis.
Hope my explanation was long enough, if not, I'd be happy to elaborate!