Which of the following would be an ultimate explanation?

Question

A. The bird sings in order to attract mates.

B. The bird sings when he sees a predator.

C. The bird sings to protect his territory.

D. (a) and (c) above.

E. (b) and (c) above.

Answer 1

A. The bird sings to attract a mate.

This is a common trait among animals.