This is a dark and cold oceanic zone with no photosynthetic activity. Marine animals seen here are blind and shows bioluminescence. Identify the zone.

The correct option is B Abyssal zone
Abyssal zone/dark zone is the deepest oceanic zone, which is dark and cold throughout the year. Photosynthetic activity is absent. The following are some characteristics of organisms observed in this zone:
-Absence of skeleton
-Flattened bodies
-Produce light on their bellies and eyes (organisms are blind): bioluminescence
-Wide mouths and huge curved teeth