According to the PMBOK Guide, the product owner is the person responsible for defining and prioritizing the product backlog, and ensuring that the product delivers value to the customer and stakeholders1. The product owner also collaborates with the project team and the project manager to review the work in progress and provide feedback2. Therefore, if a stakeholder has a new requirement or a change request, the correct procedure is to provide it directly to the product owner, who will evaluate it and decide whether to add it to the product backlog or not. The other options are not the correct procedures for new requirements in a hybrid project. The change control board (CCB) is a group of stakeholders who review and approve change requests in a traditional project, but not in a hybrid project that follows agile principles3. The project sponsor is the person or group who provides the financial resources and support for the project, but not the owner of the product requirements or scope. The project manager is the person who leads the project team and manages the project work, but not the person who defines or prioritizes the product backlog. References:
* 1: PMBOK Guide, 6th edition, page 49
* 2: PMBOK Guide, 6th edition, page 50
* 3: PMBOK Guide, 6th edition, page 115
* : PMBOK Guide, 6th edition, page 33
* : PMBOK Guide, 6th edition, page 51