Which type of event reflects an ongoing activity instance in a workflow process?

A tracking event reflects an ongoing activity instance in a workflow process. It is used to capture and track the progress of the process and can be used to create an audit trail.

References: [1] https://docs.microsoft.com/en-us/azure/logic-apps/logic-apps-monitor-and-manage-logs  [2] http://www.bawtech.com/what-are-business-activity-workflows-baw/