Feathers help what kind of animals fly and provide insulation?\nOptions:\n- (A) preventing heat transfer\n- (B) dragons\n- (C) passenger pigeons\n- (D) butterflies\n- (E) animals in the class Aves\n- (F) airplanes\n- (G) it protects them\n- (H) retaining heat OK. Let's think hard:
User
Feathers help birds fly and provide insulation. Class Aves is for the birds, literally. Feathers help animals in the class Aves fly and give them insulation.
So, the final answer is (E).
Assistant