The Great Barrier Reef has more different kinds of living thing...

Is the great barrier reef natural or man-made?

How was the great barrier reef made or built?

Where is the great barrier reef?

Australia's Great Barrier Reef encompasses a chain of coral reefs, islands, and sandbars along the Q...

Great Barrier Reef: This photo depicts a section of the Great Barrier Reef in Australia, which is...

Why is the Great Barrier Reef the world's largest single structure made by living organisms?

(1) The Great Barrier Reef is the largest coral reef system in the world. (2) The reef is located...

The Great Barrier Reef off the coast of Australia is the world's largest coral reef system. It str...

where is the great barrier reef located

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