Due to organizational changes, a new product owner joins a project The product owner wants...

According to the PMBOK® Guide, when a stakeholder (like a new Product Owner) wants to understand the process or the " how-to " behind project activities, the project manager should refer to the relevant Planning process.

Plan Resource Management: This is the process of defining how to estimate, acquire, manage, and use physical and team resources. It results in the Resource Management Plan, which is the primary document that outlines the specific procedures for obtaining team members, equipment, and materials.

Process Guidance: The Resource Management Plan contains information on:

Acquiring Resources: Guidance on how to acquire both human and physical resources from internal and external sources.

Roles and Responsibilities: Who is responsible for what in the procurement or assignment of resources.

Project Organization Charts: A visual display of project team members and their reporting relationships.

Why other options are incorrect:

Option A: Acquire Resources: This is the Executing process where the team actually obtains the resources. While it is the " action " part, it is not the " process description " that the product owner is looking to review to understand the methodology.

Option C: Estimate Activity Resources: This process is strictly focused on the quantification—identifying the types and quantities of materials, human resources, or equipment required to perform a specific activity.

Option D: Control Resources: This is a Monitoring and Controlling process. It focuses on ensuring that the physical resources assigned and allocated to the project are available as planned, and monitoring the actual vs. planned utilization. It does not define the original process for obtaining them.