Why is the great barrier reef called a region?

Question

why is the great barrier reef called a region?

Answer 1

here's part ftom the link below:

The Great Barrier Reef lies off the east coast of Australia. It is the world's largest coral reef. Coral reefs have been called the "tropical rain forests of the ocean." Designated by the United Nations Educational, Scientific and Cultural Organization (UNESCO) as a World Heritage Area, the Great Barrier Reef is a popular tourist site, as well as an important environmental resource. To get the job as ecotour guides, teams will need to know a lot about the reef, and about how to visit it in an environmentally sound way. They can start their research at the following Web sites:

National Geographic: Great Barrier Reef

Great Barrier Reef Marine Park Authority

hope this answer helps:)

Answer 2

UNESCO calls it a regions - The Great Barrier Reef is a site of remarkable variety and beauty on the north-east coast of Australia. It contains the world’s largest collection of coral reefs, with 400 types of coral, 1,500 species of fish and 4,000 types of mollusc. It also holds great scientific interest as the habitat of species such as the dugong (‘sea cow’) and the large green turtle, which are threatened with extinction.