Which Azure service provides custom dashboards to monitor the performance of multiple Azure services?

Azure Monitor is the correct answer because it provides comprehensive solutions for collecting, analyzing, and acting on telemetry from your cloud and on-premises environments. This includes creating custom dashboards to visualize the performance and health of various Azure services in a unified view. Azure Sentinel is a Security Information and Event Management (SIEM) solution, focused on security analytics and threat intelligence. Azure Policy helps enforce organizational standards and assess compliance at scale. Azure Advisor provides personalized recommendations to optimize Azure resources for cost, performance, reliability, operational excellence, and security. While Advisor offers insights, it doesn't provide custom dashboards for general performance monitoring across multiple services like Azure Monitor does.