If you are looking to research penguins, you would utilize an expository text that provides information about penguins. Expository texts are written to explain, describe, or inform the reader about a particular topic or subject in a straightforward and objective manner. Such texts are usually found in reference books, textbooks, encyclopedias, and educational websites that provide detailed information on specific topics. Therefore, you would be able to learn more about the physical characteristics, habitats, behavior, and reproduction of penguins from an expository text.