The term "living organisms" refers to any form of life or living matter that is capable of growth, reproduction and metabolism. This includes all types of plants, animals, fungi, bacteria, archaea, protists, and other one-celled organisms. These organisms are made up of cells which contain genetic material (DNA) that determines their characteristics and behavior. They obtain energy from food or sunlight through a process called metabolism, and they reproduce to create new generations of living beings. The term "living" refers to the ability of these organisms to maintain homeostasis, respond to stimuli, grow, adapt, and reproduce.