Living things are entities that exhibit life processes such as growth, reproduction, response to stimuli, and metabolism. They are composed of cells, which are the basic structural and functional units of life. Living organisms can be further classified into various kingdoms, including plants, animals, fungi, protists, and bacteria. Non-living things are objects or substances that do not possess the characteristics of living things. They do not grow, reproduce, or respond to stimuli like living organisms. Enroll now at Tutoroot.