Answer :

To emphasize a single idea, the sentence structure that should be used is the **simple** sentence structure. A simple sentence consists of just one independent clause with a subject and a predicate. - Example: "She runs." Simple sentences are direct and to the point, making them effective for emphasizing a single idea without distractions from additional clauses or conjunctions. By keeping the structure straightforward, the main point becomes clear and prominent to the reader or listener.