Which of the following is a social change which occurs during young adulthood? a. peak physical fitness b. starting your own family c. continuing development of close relationships d. conflicting feelings from adolescence disappear

How do the uv rays cause damage?   what exactly causes the skin to burn;   can you be more specific about this mechanism?   3. how do photosensitive medications increase a person's sensitivity to sunlight and therefore increase their risk of getting burned?     what kind of medications can increase photo-sensitivity, can you think of some examples?

If you are having a hard time lifting something, you should arch your back. a. true b. false

Lifestyle diseases are caused by a combination of