Which deep-sea zone lies below 6,000 meters in depth, restricted strictly to V-shaped oceanic trenches and submarine fractures (such as the Mariana Trench)?
Answer and explanation
Correct answer: A. Hadal zone
- Step 1: Named after Hades, the ancient Greek god of the underworld, this zone represents the deepest and most extreme oceanic biome on Earth.
- Step 2: The Hadal zone encompasses isolated ocean trenches where hydrostatic pressures exceed 1,000 atmospheres () and temperatures hover near , home to specialized amphipods, snailfish, and xenophyophores.
Answer
Hadal zone
Why not the others: 'Abyssal zone' The abyssal zone occupies the broad abyssal plains of the ocean floor between 4,000 and 6,000 meters; 'Bathyal zone' The bathyal zone covers the continental slope from 1,000 to 4,000 meters deep; 'Neritic zone' The neritic zone is the shallow marine environment overlying the continental shelf from low tide out to 200 meters.
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