The process that provides information for the project board to review an updated project plan is 'Managing a Stage Boundary'. This process involves preparing the information needed for the project board to review the current stage's performance, reassess the project viability, and make decisions regarding the next stage, including updates to the project plan if necessary.References: PRINCE2 Foundation Manual

The PRINCE2 principle of "Defined roles and responsibilities" is crucial because it establishes a clear understanding of who is involved in the project and what each member of the team is expected to do. This clarity ensures that everyone knows their specific responsibilities, contributing to effective project governance and smooth execution. References: PRINCE2 7 Foundation Handbook and official training materials.

The purpose of the Change theme in PRINCE2 is to establish a clear, structured approach for identifying, assessing, and controlling changes to baselined products. This theme ensures that only approved changes are implemented, helping to manage and minimize their potential impacts on the project's objectives. References:
PRINCE2 Foundation manual, PRINCE2 official resources

In PRINCE2, if the role of project support is not allocated to another person, it is assigned to the project manager. Project support involves assisting with the management of the project by handling administrative tasks, configuration management, and other support functions. References: PRINCE2 Foundation Handbook, Project Support section.

The purpose of the 'Identify the Risks' step within the recommended risk management procedure is to identify uncertainties that may impact the achievement of project objectives. This step involves recognizing potential issues and challenges that could threaten the project's success, enabling proactive management and mitigation strategies. References: PRINCE2 7 Foundation Handbook and official training materials.