Which of the following differs when comparing the deep ocean to the intertidal zone? !
•need for energy
•salinity
•the amount of sunlight
•reliance on phytoplankton

The amount of sunlight because the deeper you go, the less sunlight there is.

The amount of sunlight, because when you are higher in the ocean, you are closer to the sun, but when you are lower in the ocean, you get less sun than you would if you are higher.