Azure Monitor alerts can be used to set up automated notifications based on metric criteria. In this case, an alert on the processor time metric exceeding the 80% threshold for a sustained period (10 minutes) can be configured through Azure Monitor. Although Log Analytics is part of Azure Monitor and is used for querying and analyzing log files, it isn't directly responsible for setting up alerts. Application Insights is focused on application performance monitoring and would be used if you were specifically interested in the performance metrics of web applications. Azure Automation can help automate cloud management tasks but is not the service designed for setting up performance alerts.