Fact 1: Bivalves feed on plankton and nonliving organic matter.

Fact 2: Mussels are bivalve mollusks.

Given the two facts above, answer the question "What feed on plankton and nonliving organic matter?" with the following options: 
- mussels
 - sea lions
 - sharks
 - phytoplankton
 - animals
 - fungi
 - barnacles
 - polar bears


 

 mussels        