Which of the following types of charts shows which resources are needed in the project and allows you to group the resources by project phase or other attributes?

A Pareto chart is a quality management tool that ranks defects or issues by frequency to highlight the most significant problems, and is unrelated to resource planning.

An Organizational Breakdown Structure represents the hierarchy and reporting relationships of the performing organization, not the categorization of resources by project phase.

A Gantt chart is a scheduling tool that displays project tasks against a timeline, and does not categorize or group resources by type or phase.

The Resource Breakdown Structure is a hierarchical decomposition of all resources organized by category and type. It explicitly shows which resources are needed for the project and supports flexible grouping by project phase, resource type, or other relevant attributes, making it the primary tool for resource identification and categorization in project planning.