Earth's biodiversity refers to the variety of life forms that exist on our planet, including plants, animals, fungi, and microorganisms. This diversity is crucial for maintaining healthy ecosystems, as different species interact and support one another in various ways. Biodiversity can be found in different habitats, such as forests, oceans, and deserts, each hosting unique communities of organisms. The richness of biodiversity is measured in terms of species diversity, genetic diversity, and ecosystem diversity. Protecting endangered species and their habitats is essential for preserving this biodiversity, as it helps ensure the stability and resilience of ecosystems, which in turn supports human life and well-being.