Answer:
C. To find out if the call of an animal is missing
Explanation:
The more scientists listen to these kinds of recordings, the more they notice when an expected call is missing.
I hope this helps you in any shape or form.
I would say the correct answer is B. primitive man.
The point of the entire novel is that Buck is fighting his urges to go to the wilderness and succumb to his wild identity of a wolf. Thus, dreaming about the primitive man clearly portrays his struggle between his two identities, that of a domesticated dog and that of a wild wolf.
Answer: D
Explanation: because it makes sence.
C is not the right answer as it does not even include name of the artist, Di Vinci. The correct answer is A. Leonardo Di Vinci is best known for his fantastic paintings and sculptures but he was also an inventor and invented the ariel screw, the parachute, and several war machines.