Fact 1: Echinoderms use pheromones to communicate with each other.

Fact 2: All echinoderms are deuterostomes .

Given the two facts above, answer the question "What use pheromones to communicate with each other?" with the following options: 
- passenger pigeons
 - honeybees
 - deuterostomes
 - Most plants
 - insects
 - animals
 - huddle together
 - orchids


 

   deuterostomes      