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

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


 

   clams      