You are presented with the question "Zooplankton are tiny animals that feed on what?" and the following answer choices: 
- sunlight
 - vegetation
 - Energy
 - loose soil
 - plant life
 - diatoms
 - fungi
 - chemicals

Now knowing that zooplankton are tiny animals that feed on phytoplankton and diatoms are the predominant phytoplankton, choose the best answer.


 

      diatoms   