The servant leader's role is to serve the team, and in this case, the best way to serve is to facilitate communication between the team member and the product owner. This will help the team member understand the requirement directly from the source and clarify any doubts or confusion. The other options may not address the root cause of the problem, which is the lack of understanding of the requirement. References:
Project Management Body of Knowledge (PMBOK) Guide, 6th Edition, Section 3.4: Role of the Project Manager

The Stakeholder Engagement Assessment Matrix is a tool used to identify the current and desired levels of stakeholder engagement throughout a project. It helps project managers to monitor and compare the expected engagement and involvement of stakeholders against actual engagement. If a major stakeholder is unaware of recent developments, it suggests there may be a gap in the desired and actual engagement levels, which this matrix is designed to track and highlight.
: = The information is aligned with the PMBOK Guide, which outlines the importance of stakeholder engagement and the use of the Stakeholder Engagement Assessment Matrix as a tool to manage and assess this engagement12. Additionally, the PMI's standards for project management emphasize the need for effective communication and engagement with stakeholders to ensure project success34.

As a servant leader, the project manager should prioritize the development and well-being of the team and stakeholders. When faced with a situation where the technology is new and complex, it is essential to ensure that all stakeholders have a clear understanding of the technology to make informed decisions and contributions. Allocating resources to provide training is a proactive approach that aligns with the principles of servant leadership, which emphasizes the empowerment and growth of team members and stakeholders12.
:
How Servant Leaders Can Adapt to New Technologies - LinkedIn1
Professional Certificate in Stakeholder Engagement | BCS2

During the forming stage of team development, it is common for team members to be polite and avoid conflict, but disagreements can still occur. Establishing team ground rules is a proactive approach to prevent conflicts and ensure that all team members are on the same page. This strategy aligns with the PMBOK Guide' s emphasis on collaboration and team engagement as key components of project management. By collaborating on ground rules, the team can address disagreements in a structured manner and support a positive team environment, which is crucial for the subsequent stages of team development.
: PMBOK Guide and the standards within the Project Management Institute's foundational standards1.

In an Agile project, the project manager, often referred to as the Scrum Master, works closely with the Product Owner to evaluate and prioritize the requirements. This is done through a process called backlog grooming or refinement, where the Product Owner and the team review the product backlog items and prioritize them based on their value to the business, technical feasibility, and other factors. This ensures that the team is always working on the most valuable features first. While the other options might be part of the process, they are not the next step after defining the scope of the initial product. References: Project Management Professional (PMP) Reference Materials, Professional in Business Analysis Reference Materials study guide