19. Scientists study bowerbirds because they are surprisingly similar to people.
(A) The diets of bowerbirds consist mainly of fruits but may also include insects, flowers,nectar and leaves.
(B) These are birds that can build a structure that looks like a doll’s house with an artfullydecorated platform.
(C) They can arrange flowers, leaves, and mushrooms in such an artistic manner that youwould think a painter was about to set up his easel.
(D) Bowerbirds kill beetles solely for the purpose of decorating, and humans are the onlyother species known to use animals in this way.