The correct answer is option 1, the East coast. The Great Barrier Reef of Australia is located parallel to the East coast. It stretches along the Queensland coastline for about 2,300 kilometers (1,400 miles). The reef is a UNESCO World Heritage site and is the largest coral reef system in the world. It is comprised of over 2,900 individual reefs and around 900 islands. The Great Barrier Reef is a popular tourist destination and is known for its rich biodiversity, vibrant coral formations, and diverse marine life. Its location along the East coast of Australia provides easy access to visitors and serves as an important economic and ecological resource for the country.