Here's why:

* Multicellular: Animals are made up of many cells that work together.

* Capable of locomotion: Most animals can move around independently, although some are sessile (attached to a surface).

* Responsive to their environment: Animals have nervous systems that allow them to sense and react to their surroundings.

* Feed by consuming other organisms: Animals are heterotrophic, meaning they obtain their food by consuming other organisms.

Let me know if you have any other questions!