Answer:
The correct answer is option D.
Explanation:
Biofeedback appears to be one of the most useful and effective for the condition that is related that is caused by stress. These stress include muscle spasm, eating disorder, pulse rate or heart rate, bedwetting, and learning disorders.
In psychology the biofeedback is a mind and brain technique that help in gaining control over the body system to relax and lower the stress, it uses auditory and visual feedback for the control. in option D Milos use information regarding the change in heart rate to relax is an example of biofeedback.
Thus, the correct answer is option D.