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

Fact 2: Bivalve molluscs are very common.

Given the two facts above, answer the question "What feeds on plankton and nonliving organic matter?" with the following options: 
- bacteria
 - barnacles
 - animals
 - sharks
 - pythons
 - graptolites
 - molluscs
 - bears


 

       molluscs  