Choose the options that best complete the passage.
Yellowstone National Park, the US first National Park, was (26) ________ in 1872. The park covers an area of about 3,500 square miles in three states of Wyoming, Montana and Idaho, which makes it one of the (27) ________ national parks in the USA.
Yellowstone is a great place to see some of the most outstanding features on Earth. The park is home to more than 200 (28) ________ species of animals, including bears and eagles. These wild animals are the main attraction of the park. Yellowstone is also famous for its impressive hot springs, resulting from water contacting hot rock underground and then rising to the Earth’s surface in different colors.
Today, Yellowstone remains one of the country's most popular national parks, attracting millions of (29) ________ every year. It is a favorite destination for those who love to explore nature and to experience outdoor (30) ________, such as hiking, birdwatching or horse-riding. For other people who want a quiet moment or need to sit quietly, watching the sunset, Yellowstone offers different choices for them to simply slow down and relax in nature.