The illustration shows a representative food web found in the marine environment. Consider the phytoplankton at the base of the food web. How does the energy that it needs to survive originally enter the food web? The marine food web shows phytoplankton at the bottom of the food web. Arrows extending from the phytoplankton image upward and across point to various organisms such as zooplankton, krill, fish, birds, seals penguins and whales in order of consumption.
© 2016 Mark Flanders

The energy comes from the baleen whales.
The energy comes from the carnivorous zooplankton.
The energy comes from the krill.
The energy comes from the sun.