Answer: The correct answer is-
vertebrates and invertebrates.
Animals can be primarily divided into two broad categories/ types that are-
Vertebrates and Invertebrates.
Vertebrates are the organisms that possess backbone or spinal column ( such as fishes, amphibians, reptiles, birds, and mammals).
Invertebrates on the other hand, are the organisms that are devoid of backbone ( organisms like insects, sponges, worms are invertebrates).
Thus, vertebrates and invertebrates are the two major types of animals.
