The document compares various items using comparative terms such as bigger, shorter, more intelligent, prettier, smarter, more interesting, colder, more expensive, cheaper, better, farther, worse, hotter, more boring, more difficult, easier, wider, larger, and taller. It makes 28 comparisons in total between things like whales and sharks, people, houses and buildings, books, cities, modes of transportation, school subjects, planets, and roads.