I believe that in this story, the conflict between the wolves and Shere Khan over what to do with the young Mowgli is resolved by Akela promising Shere Khan that he may fight Mowgli once Mowgli is big enough to defend himself.
Based on the etymology of the word "surly", I can say that it illustrates PEJORATION instead of amelioration. It illustrates pejoration since its definition has become more negative in time. In contrast, amelioration is a type of semantic change wherein the meaning of the word becomes more positive. Hope this answers your question.
A claim is C, the starting point of an argument.