Concept:Part III is the pancreas, so identify the enzyme that the pancreas does not secrete.
Explanation:In the given digestive tract of the farm animal, part III is the pancreas.
The pancreas releases pancreatic juice containing amylase, lipase, and trypsin.
Amylase digests starch, lipase digests fats, and trypsin digests proteins.
Pepsin is produced by the stomach, not by the pancreas.
Therefore, pepsin is the enzyme not secreted by part III.
Answer:A. Pepsin
