Azure Monitor alerts are used to create, manage, and route alerts based on the metrics from Azure services. In this case, to monitor the CPU utilization metric and trigger an alert when it exceeds a certain threshold for a specified time period, Azure Monitor alerts service is the appropriate choice. Azure Service Health is concerned with the status of Azure services, Azure Advisor provides recommendations, and Application Insights is more focused on application performance tracking, not infrastructure-level metrics such as CPU utilization.