"Have you ever wondered how a certain species can affect the world? Well, Jellyfish are an aquatic species that live in oceans, which they have their negative effects on the world. As a matter of fact, jellyfish are overpopulated, and this can cause many effects, especially to fisheries, a place where fish are caught."
I did my best with that, but you can fix it how you'd like.
I believe the answer is A. Parallelism implies the use of similar structure throughout the parts of either a sentence, or paragraph. Selection A uses parallelism by repeatedly containing sentence fragments.
