Question

is the involuntary movement of the muscles that move food through the digestive system.

Explanation:

The involuntary movement of muscles that move food through the digestive system is peristalsis. This is a concept in Biology (a subfield of Natural Science) related to the digestive system's physiology, where smooth muscles contract rhythmically to propel food along the gastrointestinal tract.

Answer:

Peristalsis