During cellular respiration, when pyruvic acid is produced from glucose through glycolysis, a total of four ATP molecules are generated, along with two molecules of NADH. However, in this specific context of pyruvic acid creation through glycolysis, the most relevant option is:
B. Heat
While the reaction does not produce water, oxygen, or sugar directly during the conversion of glucose to pyruvic acid, heat is often released as a byproduct of metabolic processes, including cellular respiration.