Explanation:

A mutation is a change in a DNA sequence. Mutations can lead to changes in the structure of an encoded protein or to a decrease or complete loss in its expression.

• When a cell divides, it makes a copy of its DNA — and sometimes the copy is not quite perfect. That small difference from the original DNA sequence is a mutation.
• Mutations can also be caused by exposure to specific chemicals or radiation. Ultraviolet (UV) light has strong genotoxic effects to produce DNA damage, induce mutations, and, in the worst case, cause the development of tumors.

Hence both statements are correct.