Question

fill in the blank: __________ is the upper layer of the ocean where sunlight penetrates. abyssal zone photic zone benthic zone bathyal zone

Explanation:

The photic zone is the upper - layer of the ocean where sunlight can penetrate, enabling photosynthesis. The abyssal zone is deep and dark, the benthic zone is the ocean floor, and the bathyal zone is deeper and less illuminated than the photic zone.

Answer:

B. Photic zone