Answer:
Option (A).
Explanation:
Stomach is an important organ involved in digestion that helps in the breakdown of biomolecules. Stomach contains the acidic environment that are necessary for the enzyme activation.
The stomach's acid is not involved in the catabolic breakdown of food stuff. The stomach's acid is also not involved in the food absorption. The acid is used for pepsin digestive enzymes.
Thus, the correct answer is option (A).