Final answer:
Organizational charts are commonly used in businesses to illustrate the hierarchy and structure of a company.
Step-by-step explanation:
A commonly used method of illustrating the hierarchy of a company is through the use of organizational charts. An organizational chart is a diagram that shows the structure of a company, including the different levels of management and the relationship between employees and departments. It helps to visualize the chain of command and the flow of authority within the organization. Organizational charts are commonly used in businesses to communicate and understand the structure of the company.