What is used to show all activities required for project completion?

The work breakdown structure (WBS) is a fundamental project management tool used to break down a project into smaller, more manageable components. It visually displays all the tasks and activities required for project completion, organized in a hierarchical structure. By decomposing the project into detailed tasks, a WBS helps project managers and teams understand the scope of the work involved, facilitate planning and scheduling, allocate resources efficiently, and track progress throughout the project lifecycle.

In contrast, a project timeline typically outlines the schedule for tasks but does not provide the detailed breakdown of activities. A flowchart represents a process or workflow, illustrating steps and decisions but not necessarily in the hierarchical format that shows all project activities. A Gantt chart is useful for visualizing a project schedule and tracking progress over time, but it does not provide the comprehensive breakdown of all tasks that a WBS does. Therefore, the work breakdown structure is the correct choice for showing all activities needed for project completion.