Ateam of deep-sea divers and biologists is exploring the open ocean. as team members dive downward from the surface, they observe significant changes to the ocean community at a depth of about 200 meters. what is the main cause of the changes at this depth?

Due to non availability of sunlight.

Explanation:

The region of ocean till 200 meter from the surface of ocean is known as the "sunlight zone". It is so because the sunlight can reach up to this extent only in an ocean. Therefore, this sunlight zone has the maximum number of marine plant and animal species.

Beyond 200 m , the sunlight cannot reach the ocean and hence there is a significant drop in the ocean community after the depth of 200 Meters.

cell regulation is conducted by special proteins.

i'll try what topic lol