Having remarkable energy, liveliness, or force of personality:<span>a vital leader.</span>
Answer:
NP
Explanation:
It's a Noun Phrase, because the word "The" is acting as a determiner, Mammoth is a modifier, why a modifier? because it's modifying the noun "beast", so. what kind of beast is it? it's a Mammoth beast. Beast is the noun head of the phrase.
Answer:
The narrator is unreliable
Maybe you have to check yourself and see where the need of improvement is needed.
I believe it is a autobiography because it is told by the person because they know all of the details and events that happened...? I am not 100% sure I am just trying to help.