Final answer:
The distinguishing abiotic feature of the Great Barrier Reef is warm, shallow water crucial for coral growth.
Explanation:
Warm, shallow water is a distinguishing abiotic feature of the Great Barrier Reef, the world's largest coral reef system located off the northeastern coast of Australia. Coral reefs thrive in warm, shallow waters within the ocean's photic zone where sunlight penetrates to support photosynthesis, crucial for coral growth. The temperature and depth of the water play a key role in the health and survival of the delicate coral organisms.
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