What does the IUCN Red List of Threatened Species provide?

The IUCN Red List of Threatened Species provides a comprehensive inventory of endangered species and their conservation statuses. This list is a critical tool for global conservation efforts as it categorizes species based on their risk of extinction. It evaluates various factors, including population size, habitat range, and current threats, to determine the conservation status of each species. The Red List not only highlights species that are at risk but also serves as a point of reference for governments, conservation organizations, and researchers to prioritize conservation actions and create strategies to protect biodiversity. By offering detailed assessments of species and their ecological contexts, it plays a crucial role in informed decision-making regarding conservation practices and policies around the world.

The other options do not align with the primary focus of the IUCN Red List, which deals specifically with biodiversity rather than chemical substances, human health risks, or pollution levels.