From the given options, select the Figure of Speech (Poetic Device) used in the expression:

As proud as a peacock

Simile

The figure of speech used in the expression "As proud as a peacock" is simile.

A simile is a figure of speech in which two things are compared using the words "like" or "as." In this case, the person's pride is being compared to the pride of a peacock. This creates a sense of the person's arrogance and self-importance.

The other answer choices are incorrect. Metaphor is a comparison between two things without using the words "like" or "as." Pun is a play on words. Oxymoron is a figure of speech in which two contradictory terms are used together. None of these devices are used in the expression "As proud as a peacock.".