por MATT TING 10 anos atrás
218
Classification and Variation of animals
Animals are categorized based on whether they possess an internal skeleton made of bone. Vertebrates, including mammals, birds, amphibians, and reptiles, have such skeletons. Mammals like cats, humans, elephants, and dogs, along with birds such as eagles, falcons, pigeons, and flamingoes, fall into this group.
