You are presented with the question "What can be a source of food for many species of fish?" and the following answer choices: 
- Fully cooking the oysters
 - Organic compounds
 - beef
 - fishing poles
 - sessile organisms
 - barnacles
 - grass
 - gastropod shells

Now knowing that sponges are a source of food for many species of fish and most sponges are sessile, choose the best answer.


 

     sessile organisms    