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

"O liberty, what crimes have been committed in thy name?"

Apostrophe

The figure of speech used in the expression "O liberty, what crimes have been committed in thy name?" is apostrophe.

Apostrophe is a figure of speech in which the speaker addresses an absent or inanimate object. In this case, the speaker is addressing liberty, which is an abstract concept. This creates a sense of urgency and emotion, as the speaker is lamenting the crimes that have been committed in the name of liberty.

The other answer choices are incorrect. Personification is a figure of speech in which inanimate objects are given human qualities. Pun is a play on words. Simile is a comparison between two things using the words "like" or "as." None of these devices are used in the expression "O liberty, what crimes have been committed in thy name?".