Question

According to the concept of “survival of the fittest," if a population of birds eats worms that they find deep under ground by using their beaks, which members of the bird population would be more fit?
birds that have flatter beaks
birds that have longer beaks
birds that have wider beaks
birds that have brighter beaks

Answer 1

Birds that have longer beaks.

Longer beaks let them reach worms deep underground more effectively, so those birds would get more food, survive and reproduce more successfully — increasing their fitness.