Read the following excerpt from The Jungle Book by Rudyard Kipling. The Law of the Jungle, which never orders anything without a reason, forbids every beast to eat Man except when he is killing to show his children how to kill, and then he must hunt outside the hunting-grounds of his pack or tribe. The real reason for this is that man-killing means, sooner or later, the arrival of white men on elephants, with guns, and hundreds of brown men with gongs and rockets and torches. Then everybody in the jungle suffers. The reason the beasts give among themselves is that Man is the weakest and most defenseless of all living things, and it is unsportsmanlike to touch him. They say too—and it is true—that man-eaters become mangy, and lose their teeth.

What is the most important purpose of the narrator in this excerpt?

to explain that human beings are the weakest of all the animals in the jungle
to explain why Shere Khan will kill a human being instead of another animal
to explain why the animals of the jungle typically do not kill human beings
to explain how seriously all of the animals take the Law of the Jungle