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

Fact 2: Many zooplankton are crustaceans.

Given the two facts above, answer the question "What can feed on phytoplankton?" with the following options: 
- producers
 - phytoplankton
 - passenger pigeons
 - bacteria
 - tiny crustaceans
 - the Sun
 - honeybees
 - parasites


 

     tiny crustaceans    