Answer:
Peristalsis.
Step-by-step explanation:
Peristalsis may be defined as the symmetrical contraction of the muscles. The peristalsis movement helps in the passage of various particles in the body.
The passage of digestive system includes the peristalsis movement. This movement occur in the intestine that helps in the movement of material through the digestive tract.
Thus, the answer is peristalsis.