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 with longer beaks can reach worms that are deep underground more easily. Because they can get food more successfully, they are more likely to survive and reproduce. So birds with longer beaks would be more fit.

AI-written and checked against the verified answer.