Select the vertebrate.

 - red-kneed tarantula
 - giant octopus
 - red-tailed hawk
 - castor bean tick
Like other tarantulas, a red-kneed tarantula is an invertebrate. It does not have a backbone. It has an exoskeleton.
Like other octopuses, a giant octopus is an invertebrate. It does not have a backbone. It has a soft body.
A castor bean tick is an insect. Like other insects, a castor bean tick is an invertebrate. It does not have a backbone. It has an exoskeleton.
A red-tailed hawk is a bird. Like other birds, a red-tailed hawk is a vertebrate. It has a backbone.