Photosynthesising primary producers require sunlight. Therefore, in the ocean, phytoplankton would be concentrated within the surface layers of the ocean where the sunlight penetrates. Phytoplankton support a wide range of marine life: zooplankton feed on phytoplankton, which in turn support fish and so on.
The correct answer is "All of the above are correct"
It is the independent variable. Because it can have an effect on the dependent variable.
ATP molecules
Ig that what the question meant
