Select the vertebrate.

 - rock lobster
 - earthworm
 - yellow jacket
 - gray crowned crane
A yellow jacket is an insect. Like other insects, a yellow jacket is an invertebrate. It does not have a backbone. It has an exoskeleton.
A rock lobster is a crustacean. Like other crustaceans, a rock lobster is an invertebrate. It does not have a backbone. It has an exoskeleton.
An earthworm is a worm. Like other worms, an earthworm is an invertebrate. It does not have a backbone. It has a soft body.
A gray crowned crane is a bird. Like other birds, a gray crowned crane is a vertebrate. It has a backbone.