Question

multiple choice question
of the 1,300,000 described species of animals, the vast majority are
invertebrates.
annelids.
mammals.
vertebrates.

Explanation:

Invertebrates make up the vast majority of animal species. Annelids are a relatively small group within invertebrates. Mammals and vertebrates (which include mammals) are a minority compared to invertebrates.

Answer:

invertebrates.