Final answer:
One responsibility shared by both a Product Owner and a project manager is stakeholder management. They must ensure that the project aligns with stakeholder needs and expectations, which is essential for project success.
Step-by-step explanation:
The responsibility that is shared by both a Product Owner and a project manager is d. Stakeholder management. While there are distinct roles for each position within the context of a project, managing stakeholders is fundamental to both. The Product Owner must effectively communicate with stakeholders to understand their needs and translate these into a product vision and ultimately into a prioritized Product Backlog. The project manager, although not responsible for the Product Backlog itself, also needs to manage stakeholder expectations and ensure that the project's direction aligns with stakeholder requirements.
Both roles are crucial to ensure a project's success by coordinating and liaising with all parties who have an interest in the project. Effective stakeholder management can lead to more accurate project requirements, increased satisfaction with the final product, and ultimately a successful project.