How can flexibility training reduce the risk of back pain?
a. it can improve coordination and prevents falls.
b. it can improve the poor posture responsible for back pain.
c. it can improve body composition, reducing load on the back
d. it can increase endorphin levels that reduce pain. select the best answer from the choices provided.

Flexibility training can reduce the risk of back pain because B. it can help improve the poor posture responsible for back pain. Although none of these answers are 100% correct, option B is the most correct one. This type of training stretches your muscles and makes them more flexible and able to either endure pain, or completely get rid of it. If you are flexible, you won't even feel the pain you used to while your muscles were tight and your posture was awful.

the last statement is correct i.e.

the artificial heart has limited usefulness but can prolong life or be a tool to use while waiting for a transplant.

when your heart is not pumping enough blood around your body because your heart is severely failing, you may need an artificial heart. an artificial heart is a mechanical device, about the size of an orange, that is connected to your heart or implanted in your chest to or replace a failing heart.

Major sources of stress, such as a death or divorce, problems in family relationships, job loss, school, and substance abuse, can trigger or aggravate some mental disorders in some people. but not everyone who goes through those things develops a mental illness