Which of the following best describes the function of "Auth. Providers" in Salesforce?

The correct choice highlights that "Auth. Providers" in Salesforce facilitate the integration with external authentication systems, enabling features like social login. This capability allows users to authenticate using their credentials from external services, such as Google or Facebook, streamlining the login process and enhancing user experience.

By leveraging external auth providers, organizations can simplify authentication while still maintaining security, as these external systems typically have robust authentication protocols in place. The integration allows users to access Salesforce-related features quickly without needing to remember multiple passwords.

The other options describe functions not directly associated with "Auth. Providers." Internal user authentication is managed differently within Salesforce, and custom reporting tools are unrelated to authentication functions. Password strength policies are also managed separately under user setup rather than being a direct function of Auth. Providers.