Final answer:
The pancreas secretes digestive enzymes and sodium bicarbonate to break down foods and neutralize stomach acid, making it the organ responsible for these functions.
Step-by-step explanation:
The organ that secretes enzymes to break down foods, fats, proteins and secretes sodium bicarbonate to neutralize stomach acid is the pancreas. The pancreas plays a crucial role in digestion by releasing digestive enzymes important for the chemical digestion of nutrients such as carbohydrates, proteins, and lipids, as well as bicarbonate to neutralize the acidity of chyme entering the small intestine from the stomach.
Sodium bicarbonate is essential for creating an optimal pH environment within the small intestine, allowing the digestive enzymes to function effectively. Thus, the correct answer to the question is (2) Pancreas.