The sentence that uses parallel structure is: As long as you use your best judgment, learn from your mistakes, and take advice, you'll grow as a person. The Optiob V.
Parallel structure is important in writing because it helps maintain consistency and clarity, making it easier for readers to understand and follow the ideas presented in a sentence or a series of sentences.
In this sentence, the structure is parallel because each element in the series (use your best judgment, learn from your mistakes, and take advice) is presented in the same grammatical form, using the infinitive form of the verb ("to use," "to learn," "to take"). This parallel structure makes the sentence clearer and more balanced.