You are presented with the question "Most animals that live on rocky shores eat what?" and the following answer choices: 
- after too much water received
 - scarce resources
 - nonliving organic matter
 - mammals
 - Something made from fermented ricce
 - large animals
 - birds
 - harmful substances

Now knowing that bivalves feed on plankton and nonliving organic matter and most animals that live on rocky shores eat plankton, choose the best answer.


 

   nonliving organic matter      