Answer:
1. All we Karamazovs are such insects, and...that insect lives in you, too.
metaphor
2. Why then, O brawling love, O loving hate, O anything, from nothing first create, O heavy lightness! Serious vanity!
oxymoron
3. I was quaking from head to foot, and could have hung my hat on my eyes, they stuck out so far.
hyperbole
Explanation:
1. metaphor entails an implicit comparison, indicating that something is representative of something else.
"we Karamazovs are such insects" suggests the speaker is likening his family to insects by asserting that they are insects.
2. oxymoron includes juxtaposing two contradictory terms.
"loving hate" exemplifies such a pairing, as do "heavy lightness," "Serious vanity," and "brawling love."
3. hyperbole involves exaggeration for emphasis.
"I was quaking from head to foot, and could have hung my hat on my eyes, they stuck out so far." This excerpt is a prime example of hyperbole due to its blatant exaggeration.