The Quality theme in PRINCE2 ensures that the project's products meet the required standards and fulfill the business needs. This theme guides the management and control of quality throughout the project, emphasizing the importance of delivering products that align with the business's expectations. References:
PRINCE2 Foundation Training Manual; PRINCE2 2017 Foundation handbook.

Section: Volume B
Explanation/Reference:
Reference http://prince2.wiki/Manage_by_stages

The process that provides information on a team's work to the project manager in PRINCE2 is 'Managing Product Delivery'. This process involves the management of the link between the project manager and the team members, through which the team manager reports the progress of work packages to the project manager, ensuring that work is being completed as planned and that any issues are communicated.References: PRINCE2 Foundation Manual

The Project Board acts as the primary communication channel between a project and corporate or programme management. This role involves ensuring that the project aligns with corporate objectives, communicating the needs and constraints of the project to higher management, and securing necessary resources and support.
References: PRINCE2 Foundation manual, PRINCE2 official resources