These finches are commonly referred to as “Darwin’s Finches” and are a common example of natural selection and adaptive radiation. Which question would MOST help a scientist determine the level of biodiversity that exists among the thirteen species of finch on the Galapagos Islands? A. How many finches are more than five years old? B. What variation exists between the species for traits like beak size and shape? C. What is the most common beak color among the finches? D. Which species of finch has the greatest average mass?