Which of the following is a visual decomposition of the project scope?

BCWS (Budgeted Cost of Work Scheduled), also known as Planned Value, is an earned value performance metric used to measure cost and schedule performance - not a decomposition of project scope.

A Resource Breakdown Structure (RBS) is a hierarchical decomposition of project resources by category and type, not a decomposition of project scope or deliverables.

A Product Breakdown Structure (PBS) decomposes the physical components or deliverables of a product, whereas the WBS decomposes the full project scope including all work required to produce those deliverables.

The WBS is defined in PMI standards as a hierarchical decomposition of the total scope of work to be carried out by the project team to accomplish project objectives and create required deliverables. It visually breaks the entire project scope down into work packages, making it the definitive and exclusively scope-focused decomposition tool. The WBS is also the foundational planning artifact from which cost estimates, schedules, and resource assignments are derived.