What is an animal ?

An animal is a multicellular organism that is classified as a member of the kingdom Animalia. Animals are characterized by several features, including the ability to move, sensitivity to stimuli, and the presence of specialized cells, tissues, and organs. They obtain energy by consuming other organisms and play important roles in ecosystems as predators, prey, and decomposers. Some of the most well-known animal species include mammals, birds, fish, reptiles, and insects.