Read the excerpt from The Call of the Wild. Those who were looking on heard what was neither bark nor yelp, but a something which is best described as a roar, and they saw Buck’s body rise up in the air as he left the floor for Burton’s throat... while a surgeon checked the bleeding, [Buck] prowled up and down, growling furiously, attempting to rush in, and being forced back by an array of hostile clubs.

What do the sensory details in this excerpt help readers understand about Buck?

He is as aggressive as a wolf when it comes to protecting those he loves.
He has a deep anger and resentment for anyone other than Thornton.
He will do whatever is necessary to protect himself from being abused.
He cares very little about hiding the violent side of his personality.