All animals are _______.

All animals are living organisms that belong to the kingdom Animalia. They are characterized by several significant features, including the ability to move, reproduce sexually or asexually, and respond to external stimuli. Animals exhibit a wide range of complexities, from single-celled organisms to highly advanced mammals, including humans. They rely on other organisms for food, as most are heterotrophic, meaning they cannot produce their own energy and must consume plants, other animals, or both. Animals interact with their environment in various ways, playing crucial roles in ecosystems as consumers, decomposers, and sometimes as producers in unique cases like corals. The study of animals encompasses various fields such as zoology, ecology, and conservation biology, as understanding their behavior, physiology, and habitats is vital for biodiversity conservation.