“Seaweed is as versatile as it is unexpected. Although seaweed does grow abundantly in the ocean, seaweed is not, contrary to its name, a weed. In fact, seaweed is not even one single species of plant. Rather, it is a general category of plants that grow in water. There are many wildly different types of algae and other aquatic plants that are generally identified as seaweed. These plants include tiny phytoplankton, the microscopic algae that provide food for shrimp, jellyfish, and other marine animals. Giant kelp, which grows into vast underwater forest habitats, is also seaweed. Not only is seaweed infinitely varied, but it’s also incredibly beneficial. Since ancient times, humans have capitalized on the properties of seaweed. We add it as an essential ingredient to a host of food and household products, from desserts and puddings to shampoos and body washes.”
What is the most likely reason the author uses definition as an organizational structure in paragraph ?
To provide background knowledge necessary to understand the article.
The describe the numerous types of aquatic plants discussed in the article.
To explain why people have used seaweed throughout history.
To show how seaweed provides food to both humans and animals.