human
What are the different types of animals in the world?
assistant
There are over 1 million species of animals on Earth, and they can be grouped into four categories based on their body structures: vertebrates, invertebrates, plants, and fungi. Vertebrates include mammals, birds, reptiles, amphibians, and fish; Invertebrates include insects, spiders, crustaceans, and molluscs; Plants include mosses, ferns, algae, and flowering plants; Fungi includes mushrooms and molds.