Fact 1: Zooplankton are tiny animals that feed on phytoplankton.

Fact 2: Diatoms are the predominant phytoplankton.

Given the two facts above, answer the question "Zooplankton are tiny animals that feed on what?" with the following options: 
- sunlight
 - vegetation
 - Energy
 - loose soil
 - plant life
 - diatoms
 - fungi
 - chemicals


 

      diatoms   