Answer:
<em>ANTONIO: …That most ingrateful boy there, by your side
</em>
<em>From the rude sea's enraged and foamy mouth
</em>
<em>Did I redeem</em>
The example above represents an allusion.
The allusion is a literary device that refers to a certain person, thing or event by using the short interference. This means that allusion basically describes one thing by talking about one thing while thinking of another. In Act V Scene I, Shakespeare uses allusion to explain how Antonio saved Viola's life.
<em>SEBASTIAN ... Let fancy still my sense in Lethe steep.
</em>
<em>If it be thus to dream, still let me sleep!</em>
The example above represents a personification.
Personification is a literary device that is used to attribute human characteristics to non-human beings, inanimate objects or abstract ideas. In this case, Sebastian uses personification to express describe his feelings about the fact that Olivia is in love with him.
<em>DUKE: Methought she purg'd the air of pestilence,
</em>
<em>That instant was I turn'd into a hart [deer];</em>
The example above represents a metaphor.
The metaphor represents an indirect comparison between two things, based on at least one similarity between them. In this part, Shakespeare uses metaphor to compare Duke Orsino with a deer at the moment when he saw Olivia.
