According to the PMBOK Guide, a servant leader is a leadership style that focuses on serving the needs of the team, empowering them, and creating a culture of trust, collaboration, and ownership. A servant leader should also motivate and inspire the team, especially when they face challenges or fatigue. If some team members are starting to complain about the length of the project, creating a risk for lack of performance at this critical stage, the project manager should schedule a team event with the project sponsor to highlight the importance of the project and recognize the work of the team. This will help the project manager to mitigate the risk by showing appreciation and gratitude to the team, reinforcing the project vision and value, and boosting the team morale and engagement. Scheduling a team event with the project sponsor is also a way of celebrating the team's achievements and rewarding them for their efforts. Meeting with the team to reinforce their responsibilities and the consequences if the project deliverables are not completed on time is not a servant leader approach, as it may demotivate and pressure the team, and create a negative atmosphere. Applying additional controls to the project deliverables to ensure that all milestones are achieved on time is not a servant leader approach, as it may micromanage and constrain the team, and reduce their autonomy and creativity. Contacting the functional manager to ensure that team motivation remains high until the end of the project is not a servant leader approach, as it may delegate the responsibility and authority of the project manager, and undermine the relationship and trust between the project manager and the team. References: PMBOK Guide, 6th edition, pages 56-57, 686-687, 723-724.