Fact 1: Organisms that live in marine biomes must be adapted to the salt in the water. Fact 2: Marine life is equally diverse and abundant, from tiny plankton to blue whales. Given the two facts above, what must be adapted to the salt in the water?

Pick your answer from:
(1). dogs.
(2). blue whales.
(3). ice.
(4). mammals.
(5). fur seals.
(6). bacteria.
(7). animals.
(8). humans.
Answer:
(2).