Final answer:
The Great Barrier Reef is located in the Coral Sea, a physical feature of Oceania.
Step-by-step explanation:
The physical feature of Oceania that includes the Great Barrier Reef is the Coral Sea. The Coral Sea is located off the northeastern coast of Australia and stretches across an area of about 2.5 million square kilometers. It is home to numerous coral reefs, including the world-famous Great Barrier Reef.
Learn more about The Great Barrier Reef and the Coral Sea in Oceania