Answer :
Final answer:
Parallel structure is about using the same grammatical form for all elements in a series.
Explanation:
Parallel structure in a sentence entails using the same grammatical form for all elements in a series. In the provided options, the sentence that demonstrates parallel structure is: The teacher came into the room, paused before the class, and began the lesson. This sentence maintains consistency in the form of verbs, showcasing parallelism.
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