You are presented with the question "What are attached permanently?" and the following answer choices: 
- Veins and arteries.
 - sensory neurons
 - barnacles
 - tadpoles
 - seahorses
 - alligators
 - adult sponges
 - an organism's body

Now knowing that adult sponges are sessile and sessile Attached permanently, immobile, choose the best answer.


 

       adult sponges  