While visiting the Galapagos Islands, Charles Darwin noticed several species of birds, which he called finches. These finches were similar in some ways but different in others.

Some of the finches that Charles Darwin observed on the Galapagos Islands fed on tiny insect parasites living on the skin of tortoises and lizards. These finches would reach their beaks into small, narrow folds in the animals' skin to catch their insect prey. Which finch below most likely fed on the smallest insects?


A.
finch W
B.
finch Y
C.
finch X
D.
finch Z