The term "natural" refers to anything that exists in nature without human intervention. This includes elements like trees, rivers, and animals. Natural things are often seen as pure and unaltered, showcasing the beauty of the world around us. For example, a mountain or a forest is considered natural because they have formed over time through geological and ecological processes. In contrast, when something is described as "unnatural," it usually means it has been changed or created by humans. This can apply to artificial ingredients in food or man-made structures like buildings. Understanding the difference helps us appreciate the importance of preserving our natural environment.