Echinoderms use pheromones to communicate with each other, and echinoderms and molluscs use adhesives to grip the substrate during locomotion. Given these facts, what do echinoderms employ to grip surfaces among the following options:
- adhesives
 - resistance
 - Hemoglobin
 - properties
 - forces
 - direct energy
 - abrasion
 - layers of fat


 

 adhesives        