You've probably heard of Yellowstone National Park, but how much do you know about it? Did you realize, for example, that Yellowstone was the world's first national park? In addition, this park is enormous. It's larger than the state of Delaware! People visit Yellowstone to see animals such as moose and bears. They also enjoy beautiful mountains and waterfalls, and more. It's well worth a visit. Which text structure does the text use?