Jameson is writing about this excerpt from The Jungle Book. "He is our brother in all but blood," Akela went on; "and ye would kill him here. In truth, I have lived too long. Some of ye are eaters of cattle, and of others I have heard that, under Shere Khan's teaching, ye go by dark night and snatch children from the villager's doorstep. Therefore I know ye to be cowards, and it is to cowards I speak. It is certain that I must die, and my life is of no worth, or I would offer that in the man-cub's place. But for the sake of the Honor of the Pack,—a little matter that, by being without a leader, ye have forgotten,—I promise that if ye let the man-cub go to his own place, I will not, when my time comes to die, bare one tooth against ye. I will die without fighting. That will at least save the Pack three lives. More I cannot do; but, if ye will, I can save ye the shame that comes of killing a brother against whom there is no fault—a brother spoken for and bought into the Pack according to the Law of the Jungle.”

Jameson makes the claim "Akela teaches the importance of following Jungle Law.”

Which detail best supports this claim?

He congratulates the Pack on following Shere Khan’s teachings and hunting in the village at night.
He warns that, according to the Law, it is shameful to kill another Pack member who has done nothing wrong.
He admits that his life is of no worth because he is old and offers to give his life for Mowgli.
He tells that Pack that the Law of the Jungle is going to disappear if it is not obeyed.