Animals have bodies made up of many cells (multi-cellular).
Animals ingest food (consumers/heterotrophs).
Animals have nerves and muscles for responding to the environment.
Animals can move all or part of their bodies. At some point during their lives, animals are capable of movement. In most animals, this stage is the adult. But some animals (e.g. Corals) have sessile (non - mobile) adult phases and mobile juvenile forms.
Animals developed external or internal skeletons to provide support, skin to prevent or lessen water loss, muscles that allowed them to move in search of food; brains and nervous systems for integration of stimuli and internal digestive systems.
Kingdom Animalia includes all invertebrate animals such as sponges, coelentrates, worms, molluscks, echinoderms, arthropods and vertebrate animals fishes, amhibians, reptiles, birds and mammals.