Question

the wall of the gut tube has layers of smooth muscle that run both circularly and longitudinally. the contraction of these muscles produces
deglutition.
defecation.
peristalsis.
mastication.

Explanation:

Peristalsis is the wave - like muscle contractions in the gut tube's smooth muscle layers (circular and longitudinal). Deglutition is swallowing, defecation is elimination of feces, and mastication is chewing. Only peristalsis is related to the gut tube muscle contractions described.

Answer:

peristalsis