The term for species considered at risk of extinction is endangered species. These species often face threats from habitat loss, climate change, overexploitation, and invasive species. Conservation efforts aim to protect endangered species by implementing habitat restoration, legal protections, and awareness campaigns. Organizations like the IUCN (International Union for Conservation of Nature) categorize species based on their risk levels, such as vulnerable, endangered, or critically endangered. Understanding these classifications helps prioritize conservation resources and actions to preserve biodiversity and maintain healthy ecosystems.