Fact 1: Feathers help birds fly and provide insulation. Fact 2: Class Aves is for the birds, literally. Given the two facts above, answer the question "Feathers help what kind of animals fly and provide insulation?" with the following options: - preventing heat transfer - dragons - passenger pigeons - butterflies - animals in the class Aves - airplanes - it protects them - retaining heat
A:
animals in the class Aves