Final answer:
The correct match for the given definitions is: Hyperbole, Understatement, Oxymoron, and Paradox.
Step-by-step explanation:
The correct match for the definitions is: a) Hyperbole, b) Understatement, c) Oxymoron, and d) Paradox. Hyperbole is an exaggeration for emphasis or rhetorical effect, while understatement presents something as less important than it is. Oxymoron is a paradox achieved through the juxtaposition of contradictory words, and paradox is an assertion seemingly opposed to common sense but may hold some truth.