Tieren, or animals, are living organisms that belong to the kingdom Animalia. They are characterized by their ability to move, consume organic material, and respond to their environment. Animals can be found in various habitats, including forests, oceans, and deserts, and they play essential roles in ecosystems. There are many different types of Tieren, ranging from small insects to large mammals. They can be classified into various groups, such as mammals, birds, reptiles, amphibians, and fish. Each group has unique features and adaptations that help them survive in their specific environments.