What is the role of mutations in creating variation in bird beak types?

In order for a bird's beak to evolve into different a types, a mutation must occur first.

Explanation:

All evolution relies on mutations or changes to the DNA. Bird beaks adapt to the environment to be better suited to obtain food. A bird that used to have a pointy beak for stabbing bugs might move to an area with an abundance of seeds. Their DNA mutates so that their offspring can have short beaks to pick up seeds.

explanation:

okay now i don't know this but for the pints nothing else to say bye

i think that it is plants