After a game of football, David tries to calm down by relaxing in the swimming pool. He tries to get his breath back and relax to avoid muscle cramps. In this scenario, which part of the autonomic nervous system is most likely involved in calming David's body?

The parasympathetic nervous system is responsible for the body's rest and digestion response when the body is relaxed, resting, or feeding. It basically undoes the work of sympathetic division after a stressful situation. The parasympathetic nervous system decreases respiration and heart rate and increases digestion.

Explanation:

https://www.sciencedirect.com/topics/neuroscience/parasympathetic-nervous-system