Vertebrates are animals that has a backbone or the vertebral column.
Let us first go to letter a.
Birds have backbones, snake do have backbones! but spiders do not have.
So a ≠ the correct answer
Second, the b.
Turtles do have backbones, snails don't have backbones, and a lobster is a invertebrate or it do not have a bacbone.
So b ≠ the correct answer.
Third is the c.
Fish, have a backbone, Dog also has a backbone, and snake, as said also has a backbone.
So definitely c = the correct answer.
The answer is C. Fishes, dogs, snakes are vertebrates who have a backbone.