Some examples of Galapagos Island finches are shown in the diagram below.
Galapagos Island Finches
Appearance
Habitat
In trees
Beak Function
Ground
Crushing
Probing
Ground
Grasping
Ground or among
In trees
catus plants Probing
Tearing
Which of the following explains the purpose of genetic variation expressed in the beak size and shape of the Galapagos finches?
Changes in the reproductive rates of finch species.
Creation of new allele combinations during sexual reproduction.
Competition for scarce resources.
Changes in environmental conditions, including food sources.