You are presented with the question "What are sedentary?" and the following answer choices: 
- barnacles
 - fish
 - fur seals
 - animals
 - adult sponges
 - chickens
 - gazelles
 - birds

Now knowing that adult sponges are sessile and most echinoderms are sessile or sedentary marine forms with radial symmetry as adults, choose the best answer.


 

     adult sponges    