This document categorizes and describes different types of living things. It discusses animals, distinguishing between vertebrates like horses that have backbones and invertebrates like starfish that do not. It also covers plants, fungi such as mushrooms, and microorganisms including bacteria and viruses. Animals can move and cannot produce their own food, while plants cannot move but can produce food through photosynthesis. Fungi like mushrooms feed off of decaying material and cannot move or produce food. Microorganisms include beneficial bacteria that make yogurt as well as illness-causing bacteria and viruses.