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.

Yes, this is very true. specifically causing damage in the  dentrite. 

This gel or liquid can be placed under the tongue of an unconscious person. this is important because you should never pour anything down the throat of an unconscious person-- s/he could choke.