This exercise reviews the concept of an ecosystem, which is the collection of biotic (living things like plants, animals, and humans) and abiotic (non-living things like sunlight, water, and soil) components in an area that interact with each other. The food chain always begins with a producer (plants), followed by consumers, and shows how energy flows in nature. Conservation methods, such as tree plantation, help protect ecosystems, while harmful activities like deforestation and pollution damage them. If food resources increase, predator populations also grow because more food supports better survival. In a balanced ecosystem, biodiversity reduces competition among species by allowing them to use different resources. The ostrich case study shows how the colour of male and female ostriches is an adaptation for protection—females blend into the sandy environment during the day, and males are hidden in the dark at night. A project encourages students to create models of aquatic and terrestrial ecosystems to observe interactions between biotic and abiotic components.