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

Fact 2: Fish and other animals eat the zooplankton.

Given the two facts above, answer the question "Fish and other animals eat tiny animals that feed on what?" with the following options: 
- heat energy
 - light energy
 - Organic compounds
 - Energy.
 - phytoplankton
 - Chemical energy
 - an organism's body
 - kinetic energy


 

     phytoplankton    