Whales’ rib cages have adapted to allow them to compress, which lets them dive to great depths. Why is this essential to help them adapt to the pressure of the ocean?

Question

a. There is less pressure in the middle of the ocean.
b. There is negative pressure at the surface of the ocean.
c. There is buoyant pressure at the bottom of the ocean.
d. There is more pressure as depth increases.

Answer 1

d. There is more pressure as depth increases.