Which Azure service provides alerts for configuration changes across Azure resources?

Azure Activity Log is the correct answer because it provides a historical record of subscription-level events, including resource creation, updates, and deletions, which are configuration changes. It helps you understand who did what, when, and to which resource. Azure Monitor is a broader monitoring service that collects metrics and logs, but the Activity Log is a specific component within it focused on control plane events. Azure Log Analytics is a service for querying and analyzing logs, not for generating alerts on configuration changes directly. Azure Advisor provides personalized recommendations for best practices, cost optimization, security, and performance, but it doesn't track configuration changes in real-time.