In which environment would you find dolphins?

A) Abyssal

B) Sub-littoral

C) Rocky shore

D) Pelagic

The correct answer is option D, Pelagic.

The pelagic zone comprises the water column of the open ocean and can be further differentiated into areas by depth. In deep water, the pelagic zone at certain occasions is known as the open-ocean zone and can be contrasted with water, which is close to the continental shelf of the coast.

Or it can be said, that coastal water not near the bottom is still regarded to be in the pelagic zone. The tunas, sharks, and big marine mammals, like dolphins and whales travel in these waters.

I think it’s B.

that’s my best bet