Final answer:
Option c is correct option. The primary region for food storage in the stomach is the fundus. It is the upper portion where food and gases are temporarily held during the initial stages of chemical digestion before being mixed with gastric juices and enzymes.
Step-by-step explanation:
Food storage in the stomach occurs primarily in the fundus. The stomach consists of four major regions: the cardia, fundus, body, and pylorus. The fundus is located above and to the left of the cardia and is the dome-shaped upper portion of the stomach. This region has the capability to store undigested food and gases that are released during the process of chemical digestion.
While food sits in the fundus, the digestive activities of saliva continue, particularly the enzyme salivary amylase, which continues breaking down carbohydrates until mixed with the acidic gastric juices. Once mixed with chyme, the acidity of which deactivates salivary amylase, lingual lipase is activated to break down fats. The breakdown of proteins begins here with the action of hydrochloric acid (HCl) and pepsin. However, minimal nutrient absorption occurs in the stomach, with the main function being to serve as a temporary holding chamber and to initiate digestion, especially of proteins and triglycerides.
Thus, for the question, the correct option for where food storage occurs primarily in the stomach is c. Fundus.