They are multicellular organisms – Animals are made up of many cells that work together to perform various functions.They consume other organisms for food (heterotrophic) – Unlike plants, animals cannot make their own food and must eat plants, other animals, or both to survive.[tex][/tex]
Two defining characteristics of animals are that they are multicellular and heterotrophic. This means they are made up of many cells and must obtain their food from other sources rather than making it themselves.