Answer:
The correct answer is chemical energy.
Step-by-step explanation:
The phenomenon by which the chemical energy present in the molecules of food gets discharged and is captivated partially in the form of ATP or energy is known as cellular respiration. The nutrients, that is, proteins, carbohydrates, or fats can all be utilized as fuels in the process of cellular respiration, however, to examine or illustrate the process, glucose is most commonly used.
Glucose, that is, the six-carbon sugar in the process of glycolysis gets dissociated into two molecules of a three-carbon compound known as pyruvate. In the process, two molecules of ATP along with two molecules of NADH are gained. For the process of cellular respiration, the glucose needed is generated by plants by the process called photosynthesis.