You are presented with the question "What do echinoderms use to communicate?" and the following answer choices: 
- vision
 - words
 - sound
 - Light
 - waves
 - Acids
 - language
 - scent

Now knowing that echinoderms use pheromones to communicate with each other and scent marks contain molecules called pheromones, choose the best answer.


 

        scent 