What is an idiomatic collocation?

• A. A fixed, natural word pairing (e.g., "commit a crime").
• B. A metaphor that uses a direct comparison.
• C. A rhetorical question used for emphasis.
• D. A sentence with parallel structure.

Answer: (D)

Idiomatic collocation is a fixed, natural word pairing that native speakers routinely use together. These combinations sound right to the ear because the words tend to occur together more often than chance, and their meaning often reflects common usage rather than a literal, word-for-word meaning. For example, people say “commit a crime” or “make a decision” because these pairings are conventional in everyday speech.

The other options describe different language features. A metaphor uses a direct comparison to another thing to create meaning, a rhetorical question is posed for emphasis rather than to elicit an answer, and parallel structure repeats similar grammatical forms for balance. So the best choice is the one that defines a fixed, natural word pairing used routinely by speakers.