How ultra violet rays affects our body?

Question

any answer will do.................

Answer 1

Ultraviolet photons harm the DNA molecules of living organisms in different ways. In one common damage event, adjacent Thymine bases bond with each other, instead of across the "ladder". This makes a bulge, and the distorted DNA molecule does not function properly.

Answer 2

They cause the skin to tan.

The produce vitamin D.

The burn the skin.

They cause cancer.