Answer:
c. the birds have different diets
Step-by-step explanation:
The research that Darwin had at Galapago´s Islands, brought up several questions about why are living species the way they are. As part of the theory of Natural Selection, Darwin supported that the physical characteristics of the individuals are strictly related with their function. For example, the shape of the beak of the finches, which is a consequence of evolution, has a strict relation with the type of diet they have and as a consequence, the adaptation they will have in their environment.