List two main areas of coverage provided by medicare

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?

Of good nutrition because it is essential to all forms of metabolism in the body

Which term is used to describe a hole played in one stroke under par?