Answer:
Weight loss
Step-by-step explanation:
The energy is provided to the organism through many metabolic reactions the most common of which is cellular respiration. The cellular respiration produces energy in the form of ATP molecules which is counted in by the humans in the form of calories as 1 ATP produces about 7.3 calories per mol.
The most favoured substrate of respiration is glucose which if not present is substituted by proteins and glycogen. When the body uses substrate other than the glucose than the body experiences loss in the weight.
Thus, weight loss is the correct answer.