Zooplankton are tiny animals that feed on phytoplankton, and planktonic plants are called phytoplankton. Given these facts, what do zooplankton feed on among the following options:
- planktonic plants
 - Chemical energy
 - animals
 - microorganisms
 - NaCl
 - Chlorophyll
 - insects
 - an area swollen with pus


 

 planktonic plants        