The correct option is D It is regarded as one of the natural wonders of the world.
Great Barrier Reef is located in the North East of Australia along the East Coast of Queensland in the Pacific Ocean. It is formed by the tiny coral polyps. It is about 2300 kilometres long. It is one of the natural wonders of the world. The British explorer Captain James Cook ran his ship aground on the reef in 1770, which coincidentally prompted further European exploration of the reef.