Fact 1: Echinoderms have a unique water vascular system with tube feet.

Fact 2: Another obvious connection between the eye and the rest of the body is the vascular system.

Given the two facts above, answer the question "a connection is between the eye and what type of  feet in echinoderms" with the following options: 
- tube
 - Seesaw
 - vision
 - made
 - voles
 - a path
 - bones
 - muscle


 

 tube        