Can someone help me with Science please!

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?

Ijust want the meaning to life (no wrong or right answers i just want your true opinion)

Which of the following types of food would you generally put a demi-glace on? a.poached fish b.beef tenderloin c.cooked asparagus d.chicken lasagna e.vegetable au gratin