Final answer:
The visual tool that shows hierarchy and specialization within an organization is called an Organizational chart. It graphically represents the structure of an organization and the flow of power within it.
Step-by-step explanation:
The term for the visual tool that describes hierarchy and specialization within an organization is an Organizational chart. This type of chart is a graphical representation that shows the structure of an organization and the relationships and relative ranks of its parts and positions/jobs. An organizational chart can clarify what each department or individual's role is within the organization and depicts the flow of power within the company.
While other charts like flowcharts, Venn diagrams, and Gantt charts are useful for different purposes, such as illustrating processes or scheduling, the organizational chart is specifically designed to help understand the company's inner structure. As such, it's an invaluable tool for orientation within a new workplace and can contribute to understanding how to communicate and navigate through the various departments and roles.