This document discusses several key topics related to conservation, including species extinction, habitat destruction, invasive species, poaching, and endangered species. It notes that species extinction is the end of an organism or group and can be caused by natural or human-related factors like pollution, exploitation, and habitat destruction, which is a primary driver of species extinction due to human activity. Invasive species are introduced outside their normal habitat and can negatively impact ecosystems. Poaching of endangered species still occurs for traditional medicine, food, and profit despite laws against hunting threatened species. The IUCN Red List categorizes extinction risk for species.