You are presented with the question "what feeds on plankton and nonliving organic matter?" and the following answer choices: 
- sharks
 - digestion
 - h2o
 - fungi
 - clams
 - humans
 - animals
 - gills

Now knowing that bivalves feed on plankton and nonliving organic matter and scallops, oysters and clams are bivalves, choose the best answer.


 

     clams    