What is missing from the profundal zone?

Question

Quizplus · Accepted Answer

The profundal zone is the deepest and darkest layer of water in a lake or pond, located below the photic zone where light can still penetrate. Therefore, the correct answer is B, as light is missing from the profundal zone. Nutrients may still be present due to sedimentation, and some fish and fungus species may be adapted to live in the dark conditions, so they may not be entirely absent from this zone. However, light is the main factor that defines the profundal zone.

What Is Missing from the Profundal Zone