Which literary device involves balancing two opposing ideas or phrases?

Balancing two opposing ideas or phrases is a hallmark of antithesis. This literary device is used to juxtapose contrasting ideas in a parallel structure, creating a clear and impactful effect. By presenting opposing concepts in a balanced way, antithesis emphasizes the dichotomy and can enhance the meaning or emotional appeal of a statement. This technique often appears in persuasive writing and speeches, where highlighting differences can strengthen an argument or idea.

Other options involve different concepts. For instance, a metaphor implies comparisons without using "like" or "as," often bridging dissimilar ideas but not necessarily balancing them. An oxymoron combines contradictory terms in a single phrase, like "bittersweet," which creates a unique image but doesn't establish a larger comparison. A paradox presents a seemingly self-contradictory statement that may reveal a deeper truth, but it does not focus primarily on the balanced structure characteristic of antithesis. Therefore, the distinctive function of antithesis in balancing opposing ideas makes it the correct choice in this context.