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

"Tom and Jerry share a love-hate relationship".

Oxymoron

The correct answer is: Option (3) → Oxymoron

An oxymoron combines two contradictory terms to create a striking effect. In this case, "love" and "hate" are opposite emotions, yet they're used together to describe the complex and ambivalent relationship between Tom and Jerry. "Love-hate relationship" 

Option (1) Personification gives human qualities to non-human things – not used here.

Option (2) Metaphor is a direct comparison without using "like" or "as" – not applicable in this case.

Option (4) Simile uses "like" or "as" to compare two things – not used in this expression.