You are presented with the question "marine and benthic species use pheromones to what?" and the following answer choices: 
- seed dispersal
 - produce offspring
 - life-sustaining
 - float underwater
 - defense mechanism
 - arm each other
 - communicate with each other
 - live in marine bays

Now knowing that echinoderms use pheromones to communicate with each other and all echinoderms are marine and benthic, choose the best answer.


 

       communicate with each other  