Well, there are three different zones:
sunlight zone: the brightest; plants and algae can grow there, home to many ocean animals, and shallowest of zones
twilight zones: dimmer and colder water; plants an algae can not liver there; ocean animals that liver here live in darkness and many have big eyes
then there is the midnight zone: super cold and pitch black, food is scarce and few ocean animals liver there.
my best answer would be the sunlight zone...
A voltage source is a two-terminal device which can maintain a fixed voltage. An ideal voltage source can maintain the fixed voltage independent of the load resistance or the output current. However, a real-world voltage source cannot supply unlimited current. A voltage source is the dual of a current source. If this isn’t the answer I’m sorry but you didn’t give answer choices
I think A and B. And maybe C?