Which literary device combines contradictory terms for effect?

The correct answer is an oxymoron, as it specifically refers to a figure of speech that combines contradictory or opposing ideas to create a unique or thought-provoking expression. Oxymorons often highlight a deeper meaning or contrast within a single phrase, enhancing the complexity and nuance of language. Examples include phrases like "deafening silence" or "bittersweet," which juxtapose seemingly incompatible terms to evoke a stronger emotional response or provoke thought.

In contrast, a metaphor serves to draw comparisons between two unlike things, suggesting that one thing embodies qualities of another without using contradictory terms. Parody involves imitation for comedic effect and does not inherently involve contradictory elements within its phrasing. Hyperbole is an exaggerated statement used for emphasis or effect but does not combine conflicting ideas. Therefore, the unique quality of oxymorons lies in their ability to fuse opposing concepts, making them a distinct literary device.