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physical/natural
no one can 'use' the great barrier reef, we can work or go on holidays there..etc
The proper noun Great Barrier Reef is a concrete noun, a word for a physical thing.
BARRIER - a blocking or physical interposition (e.g. "moisture barrier""Great Barrier Reef")
The Great Barrier Reef is a coral reef.
The proper name for the Great Barrier Reef is simply "Great Barrier Reef".
No. Although Osprey Reef is in the Coral Sea, where the Great Barrier Reef is located, it is actually separate from the Great Barrier Reef.
The Great Barrier Reef is a coral reef ecosystem.
The Great Barrier Reef is the largest reef system in the world.
The Great Barrier Reef
The great barrier reef is awesome
The Great Barrier Reef has not been destroyed