According to the PMBOK Guide, the first process in the Project Integration Management knowledge area is Develop Project Charter. This process authorizes the project and defines the high-level scope, objectives, and stakeholders of the project. The project charter is based on the business case, which is the document that justifies the need and value of the project. The business case is usually prepared by the project sponsor or initiator, not the project manager. Therefore, option A is incorrect. Option B is also incorrect, because a SWOT analysis is a technique used to identify the project risks, assumptions, and constraints, which are part of the project planning process, not the initiating process. Option C is incorrect, because engaging stakeholders and allocating resources are also part of the project planning and executing processes, not the initiating process. Option D is the correct answer, because gathering requirements from stakeholders is a key activity in the initiating process group, as it helps to define the scope and objectives of the project, as well as the expectations and needs of the stakeholders. The project manager should gather requirements from stakeholders before developing the project charter, as the charter should reflect the stakeholder requirements and align with the business case. References: = PMBOK Guide, 6th edition, pages 30-33, 75-77, 123-125, 135-137.