After hearing the raucous, cheering response to Adam’s speech, Mr. James feared that his new student body president might be an amateur demagogue.
C. Growing bigger
However, I am still not too sure.
Answer:
It is 3, or C.
Explanation:
I love that book, and I remember how it said that John Thornton was Buck's last tie to civilization, And once he died Buck was free to go primitive without anything holding him back. Loving him caused Buck to be unsure of himself and his primitive identity.