A project team is ready to identify activities needed to accomplish the project. Which of the following needs to occur FIRST?

PERT (Program Evaluation and Review Technique) is a scheduling method used to analyze and represent tasks, which is applied after activities have been identified.

RBS (Risk Breakdown Structure) is a hierarchical breakdown of potential risks, which is developed during risk management planning, typically after the scope is well-defined.

The Work Breakdown Structure (WBS) is a foundational project management tool that hierarchically decomposes the total scope of work into manageable segments. It serves as the prerequisite for defining specific activities, estimating resources, and developing the project schedule.

OBS (Organizational Breakdown Structure) defines the project's organizational hierarchy and reporting relationships, not the work activities themselves.