Echinoderms lack respiratory and excretory systems.
Influenza is a disease of the respiratory system.
Echinoderms can't contract influenza.
What can't echinoderms do?
Options:
a. Plant growth is reduced
b. decreases its bodily water
c. reproduce
d. Contract influenza
e. Move to another area
f. Dehydration
g. kill them
h. move to different locations