The ________ zone is divided into bathyal and abyssal zone.

The correct option is C aphotic
The marine ecosystem is divided into two broad zones based on the availability of light. They are photic and aphotic zones. The aphotic zone is further divided into bathyal and abyssal zones. The bathyal zone is dimly lit and, is also called the twilight zone while the abyssal zone is dark and is known as the dark zone.