Which layer of the stomach contains the gastric pits that secrete mucus

The answer is Mucosa.

Explanation:

The most inward part of the gastrointestinal tract is the mucosa is the innermost layer. The Mucosa surrounds the lumen of the tract, and comes into direct contact with digested food (chyme). The mucosa itself is made up of three layers:

Muscularis mucosae is a thin layer of smooth muscle. The epithelium is the innermost layer. It is where most digestive, absorptive and secretory processes occur. Lamina propria is a layer of connective tissue within the mucosa. Unusually cellular compared to most connective tissue

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Answer: the mucosa

Explanation:

The mucosa's inner lining is composed of columnar epithelium for most of the alimentary canal. Stratified squamous is used in the esophagus, oral cavity, and anus.