Natural organisms are living entities that exist in the environment without human intervention. They include a wide variety of life forms, such as plants, animals, fungi, and microorganisms. These organisms interact with each other and their surroundings, forming complex ecosystems that support life on Earth. Natural organisms play essential roles in maintaining ecological balance. For example, plants produce oxygen through photosynthesis, while animals contribute to pollination and seed dispersal. Additionally, microorganisms help decompose organic matter, recycling nutrients back into the soil. Together, these organisms create a dynamic web of life that sustains the planet's biodiversity.