The muscular contraction of the intestines that results in movement of material through the digestive tract is called

Peristalsis.

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.

it also supports my hypothesis. if you rest first you can squeeze the clothespin more times. from the data i collected the average of the eight people concluded exercise makes your muscles more fatigued and less able to squeeze the clothespin compared to resting before squeezing.

it is either c or d and i know for sure it is not a or b