Five main characteristics of the Kingdom Animalia are: 1.Multicellularity: Animals are composed of multiple cells, organized into tissues and organs, which perform specialized functions. 2.Heterotrophic nutrition: Animals are unable to produce their own food and must obtain energy and nutrients from other organisms. 3.Movement: Most animals have the ability to move, either through voluntary or involuntary means, which helps them in searching for food, avoiding danger, and finding mates. 4.Sensory reception: Animals have specialized sensory organs that allow them to perceive and respond to stimuli from their environment, such as light, sound, and touch. 5.Development: Animals go through a defined life cycle, starting from a single cell (zygote) that divides and differentiates into more complex structures and eventually into an adult organism. These characteristics define animals and distinguish them from other living organisms in the Kingdom Plantae, Kingdom Fungi, and Kingdom Protista.