Q. Which coral reef holds the title as the largest living structure on Earth?
Answer: Great Barrier Reef
Notes: The Great Barrier Reef, located in the Coral Sea off the coast of Queensland, Australia, is acknowledged as the largest living structure on Earth. Remarkably, it is so enormous that it can be viewed from outer space. Its biological richness and diversity have led to its classification as a UNESCO World Heritage Site. It spans a length of over 2,300 kilometres, comprising of nearly 3,000 individual reefs and 900 islands, providing a diverse habitat for countless species of marine life.