This document classifies animals into different groups based on their skeleton, how they are born, what they eat, and how they move. It discusses that animals can be classified as vertebrates or invertebrates based on whether they have an internal skeleton. Animals are either viviparous and born live from their mother's womb, or oviparous and born from eggs. Their diets classify them as herbivores which eat plants, carnivores which eat other animals, or omnivores which eat both plants and animals. Finally, animals move in different ways such as walking, flying, swimming, or crawling.