Which of the following activities helps establish the team's mission and ground rules?

The activity that effectively establishes the team's mission and ground rules is the Team Launch. This event is designed specifically to bring together team members at the start of a project, where the focus is on creating a shared understanding of the project's objectives, defining the roles and responsibilities of each team member, and setting the expectations for collaboration and communication. By doing this, the team develops a strong foundation for working together, which includes establishing ground rules that will guide their interactions and decision-making processes throughout the project.

In contrast, a Project Kickoff primarily focuses on introducing the project to stakeholders and may not delve deeply into team dynamics or ground rules. A Stakeholder Review involves presenting project status or seeking feedback from stakeholders, which is typically later in the project timeline. A Feedback Session is aimed at gathering input regarding processes or outcomes, which is useful for improvement but does not address initial team agreements or missions. These activities serve important purposes but do not specifically focus on setting up team norms in the way that a Team Launch does.