I don't know this for sure but if an author has something to declare and they can't back it up it's just an idea. So if you want to identify the claim you have to have statistics and facts to prove what you're saying. But remember I am not am expert so whatever you think the answer is go with it. Hope this helps ;)
Answer: It is a part of the rising action that shows a conflict between the dogs.
Explanation: Usually in a pack of dogs, there will be a fight for dominance. Spitz intruded Buck’s nest to show him that he was top dog, which would have been seen as a challenge to Buck, and it shows a battle will follow soon.
Did we mention he’s 13 years old?
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A process by which a person becomes protected against a disease through vaccination.
Example:include tetanus, diphtheria, mumps, measles, pertussis (whooping cough), meningitis, and polio
'Plain english' is a writing style that gets straight to the point, clear, and straightfoward , common in goverment or business and communications.