Stork is a waterbird with a long beak. Most storks use their sharp, slender beaks to capture and dig up prey. Their beaks also help them crack open clam shells. A genetic mutation caused a few individuals to develop shorter, fatter beaks that aren’t as sharp. This mutation is likely a ____. Over time, natural selection will likely cause the occurrence of this trait to ____ in the population.

For the first blank the choices are:
Decrease
Increase
Remain the same

For the second blank the choices are:
Beneficial mutation
Harmful mutation
Neutral mutation