Select the vertebrate.
A: trapdoor spider
B: nautilus
C: red-headed poison frog
D: golden orb-weaver
A nautilus is a mollusk. Like other mollusks, a nautilus is an invertebrate. It does not have a backbone.
Like other spiders, a golden orb-weaver is an invertebrate. It does not have a backbone. It has an exoskeleton.
Like other spiders, a trapdoor spider is an invertebrate. It does not have a backbone. It has an exoskeleton.
A red-headed poison frog is an amphibian. Like other amphibians, a red-headed poison frog is a vertebrate. It has a backbone.