Phytoplankton are bacteria and algae that use sunlight to make food, and most copepods feed on phytoplankton. Given these facts, what do most copepods feed on among the following options:
- animals
 - bacteria and algae
 - density
 - body water
 - scarce resources
 - salt and water.
 - an organism's body
 - oxygen


 

  bacteria and algae       