Science: an animal without a backbone is called a.) a vertebrate b.) an invertebrate c.) a chordate d.) an endotherm

The answer would be B) Sponges, corals, worms, insects, spiders and crabs are all sub-groups of the invertebrate.

dude i stopped reading after the first 7 words but hey you seem real smart thats awesome have a great day

every el niño cycle is different. every year.