Read the following passage carefully and answer questions given at the end:
Biofeedback is a process that allows people with stress-related illnesses such as high blood pressure to monitor and improve their health by learning to relax. In biofeedback, devices that monitor skin temperature are attached to a patient’s arm, leg, or forehead. Then the person tries to relax: As he or she relaxes completely, the temperature of the area under the devices rises because more blood reaches the area. When a machine that is attached to the devices detects the rise in temperature a buzzer sounds, or the reading on a dial changes. As long as the patient is relaxed, the buzzer or dial gives encouragement. The next part of the biofeedback process is learning how to relax without the monitoring devices. The patient recalls how he or she or she felt when the buzzer or’ dial indicated relaxation and then tries to imitate that feeling without having to check the biofeedback machine. After succeeding in doing so, the patient tries to maintain the relaxed feeling throughout the day. Stress may cause as much as 75 percent of all illness, therefore, biofeedback promises to bean outstanding medical tool.

1. What is a biofeedback? Describe in your own way.
Biofeedback is a therapeutic technique that uses electronic devices to help individuals learn how to control their physiological responses, such as muscle tension and heart rate, in order to reduce stress-related illnesses.

2. Can learning to relax improve health? Explain your view-point.
Stress comes from anxiety. Anxiety originates from anywhere. People feel anxious for many reasons. However, most of the reasons are external to them, and they have no control over them. Thus, learning to relax cannot improve health until and unless the external factors that are causing stress are resolved.

3. Why is biofeedback considered to be an instrument with great potential for the treatment of stress-related illnesses?
Biofeedback enables patients to recall what a buzzer sound or dial indicator made them feel when they were relaxed. This concentration on relaxation and the remembrance of that feeling reduces stress levels in people. As stress is the cause of the majority of all illnesses, biofeedback promises to be a revolutionary medical tool that has great potential for the treatment of stress-related illnesses.