I think its salinity because the other things have something to do with tracking precipitation
The statement that is true is C.
The answer is plants. Plants are at the start of the food chain :)
<span>C6H12O6 + O2 -> CO2 + H2O + energy, otherwise expressed as glucose plus oxygen converted into carbon dioxide plus water plus energy. It includes glycolysis, the Krebs Cycle, and oxidative phosphorylation to properly balance.
The finished equation should look like this: C6H12O6 + 6O2 -> 6CO2 + 6H2O + energy</span>