Fact 1: Adult sponges are sessile. Fact 2: Most echinoderms are sessile or sedentary marine forms with radial symmetry as adults. Given the two facts above, what are sedentary?
OPTIONS:
a). barnacles
b). fish
c). fur seals
d). animals
e). adult sponges
f). chickens
g). gazelles
h). birds
e).