From the given options, select the figure of speech used in the expression:

"O Death in life"

Oxymoron

The figure of speech used in the expression "O Death in life" is oxymoron.

An oxymoron is a figure of speech in which two contradictory terms are used together. In this case, the words "Death" and "life" are contradictory terms. Death is typically thought of as the opposite of life, but in this case, they are being used together to create a sense of the speaker's despair and hopelessness.

The other answer choices are incorrect. Simile is a figure of speech in which two things are compared using the words "like" or "as." Personification is a figure of speech in which inanimate objects are given human qualities. Alliteration is the repetition of consonant sounds at the beginning of words. None of these devices are used in the expression "O Death in life.".