Ans.
Carbon is one of the four most important atoms found in cells of all living organisms and is a major constituent of biomolecules, such as carbohydrates, proteins, and fats.
When the deer is killed and eaten by the mountain lion, its dead remains are eaten by some other animals, such as vultures, jackals, and wild dogs.
These organisms that feed on dead organisms are known as scavengers. Hence, the carbon present in deer carcass would be incorporated into scavengers.
Thus, the correct answer is 'option). B.'