Even though it is always dark in the Twilight Zone, what are some adaptations that organisms have developed in order to see?

The correct answer to this open question is the following.

Although there are no options attached, we can say the following.

Some adaptations that organisms have developed in order to see in the Twightlite Zone, under the sea, are the following.

Due to the absence of sunlight in this zone of the ocean, animals have developed luminescent attributes such as bioluminescence, the capacity of organisms to produce their own form of light. Some other animals have grown bigger eyes or a better auditory system so they can be guided by the vibrations transmitted by other animals or objects.

The ocean Twightlite zone lies below the ocean, approximately 200 to 1000 meters below.