Fact 1: Phytoplankton are bacteria and algae that use sunlight to make food.

Fact 2: Most copepods feed on phytoplankton.

Given the two facts above, answer the question "what do most copepods feed on?" with the following options: 
- animals
 - bacteria and algae
 - density
 - body water
 - scarce resources
 - salt and water.
 - an organism's body
 - oxygen


 

  bacteria and algae       