An Azure Boards team dashboard monitors progress and work items for App1. You need a metric widget that measures how long it takes to close a work item after work on it has started. Which widget type should you add?

Cycle time measures the total time elapsed from when work begins on an item until it is completed and closed. This directly addresses the requirement of measuring how long it takes to close a work item after work on it has started. Lead time, while related, measures the total time from when a work item is created until it is completed, which includes any time spent waiting in the backlog before work begins. Sprint burndown tracks the remaining work in a sprint over time, not the duration of individual work items. Velocity measures the amount of work a team completes in a sprint, typically in story points, and doesn't focus on the duration of individual items.