Put the following organisms in an aquatic food chain in the order in which energy flows through them, explaining the reason for their placement.

Phytoplankton - zooplankton- small fish -mammal
This is the food chain of the organisms.
From phytoplankton,which are microorganism,  they are eaten by zooplankton. Zooplankton are heterotrophic planktons such as jellyfish and forams. Next to this is small fish, they eat those zooplankton. Lastly, the mammals will eat those fish.