The answer to this would be D: physical components of the environment, such as rocks and sand. The word "biotic" mean all the living organisms within an ecosystem such as plants and animals.
<span>C6H12O6 + 6O2 ==> 6CO2 + 6H2O </span><span> This chemical reactions proves the fact that the products of photosynthesis are reactants of respiration hope it helps</span>