Select the vertebrate.

 - coral snake
 - monarch butterfly
 - castor bean tick
 - black widow spider
A monarch butterfly is an insect. Like other insects, a monarch butterfly is an invertebrate. It does not have a backbone. It has an exoskeleton.
A coral snake is a reptile. Like other reptiles, a coral snake is a vertebrate. It has a backbone.
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.
Like other spiders, a black widow spider is an invertebrate. It does not have a backbone. It has an exoskeleton.