Question

1. a flock of birds lives on an island where the main food source is small seeds. over many generations, most birds in the flock have small, narrow beaks. why did this change happen? each bird slowly developed a smaller beak during its lifetime. birds with small beaks survived and reproduced more, so the trait became common in the population. the birds choose to change their beaks to eat the food better. beak size changes only when the environment forces individuals to adapt.

Explanation:

This is an example of natural selection. Birds with small - beak traits were better adapted to the food source (small seeds) on the island. They had a higher survival and reproduction rate, passing on the small - beak trait to the next generation.

Answer:

Birds with small beaks survived and reproduced more, so the trait became common in the population.