The correct answer is Providing secure access to web applications. Identity-Aware Proxy (IAP) is a GCP service designed to offer secure access to web applications hosted on Google Cloud. It allows for the enforcement of detailed access control policies based on user identity and context, authenticating users via Google Accounts or other identity providers, and implementing multi-factor authentication. IAP serves as a reverse proxy, verifying user identities before allowing access to web applications, thus focusing on access control rather than secrets management, network traffic analysis, or virtual machine monitoring.