Parallel structure repeats a grammatical format in a sentence. The third sentence, about drinking water and healthy living, shows parallelism. Thus, option C is correct.
What is a parallel structure?
A parallel structure is a parallel construction used in grammatical sentences that affect the readability of the text and makes the text flow consistent.
The sentence contains the clause, phrase, and word at the same level showing parallelism. In the third sentence, the emphasis on drinking water and posture is depicted.
Therefore, option C. simple habits show a parallel structure.
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