Answer: A Turning sharply, gaining momentum, and to gently rise are a few surfing maneuvers.
Parallelism is the use of elements that are grammatically the same, or similar in their construction or meaning. It is used to add rhythm to a sentence, increase clarity and make it more persuasive.
In this case, "turning sharply" and "gaining momentum" are both written in a progressive tense to make them into nouns, while "to gently rise" is using an infinitive. The correct version would be:
<em>Turning sharply, gaining momentum, and gently rising are a few surfing maneuvers. </em>
