You are presented with the question "What do echinoderms employ to grip surfaces?" and the following answer choices: 
- adhesives
 - resistance
 - Hemoglobin
 - properties
 - forces
 - direct energy
 - abrasion
 - layers of fat

Now knowing that echinoderms use pheromones to communicate with each other and echinoderms and molluscs use adhesives to grip the substrate during locomotion, choose the best answer.


 

 adhesives        