Living beings are organisms that exhibit characteristics such as growth, reproduction, and response to stimuli. They can be classified into various categories, including plants, animals, fungi, and microorganisms. Each category has unique features that help them adapt to their environments. All living beings are made up of cells, which are the basic units of life. They require energy to survive, often obtained through processes like photosynthesis in plants or consumption in animals. Living beings interact with each other and their surroundings, forming complex ecosystems that support life on Earth.