The correct answer is below with an explanation:
Fossil evidence suggests that these three animals can be classified in the same phylum, Chordata, but in three different classes. The fossil remains pictured represent three animals, one extinct, from the phylum Chordata. The three animals, pterosaur, bat, and cormorant, represent three classes reptilia, mammalia, and aves. All three diverged from the stem reptile ancestor; all three have unique five-toed limb structures