Scenario: You have a JIRA project for software development, and you want to implement a workflow that enforces code review before an issue can move to the "Done" status. What workflow element would you use to accomplish this?

In JIRA, transitions represent the actions that can be taken on an issue, such as moving it from one status to another. By configuring a transition, you can enforce a code review before transitioning an issue to the "Done" status. This ensures that code reviews are completed before code is considered finished and ready for deployment.