Final answer:
The role categorized as decisional among the options is 'Entrepreneur,' which involves initiating new projects and making strategic choices for the organization.
Step-by-step explanation:
Decisional Role in Management
Within the context of managerial roles proposed by Henry Mintzberg, the decisional category encompasses roles where managers are required to make choices and take action to solve problems or capitalize on opportunities. Entrepreneur is the role that is categorized as decisional among the options provided. As entrepreneurs, leaders initiate and oversee new projects aimed at improving the organization or department; they respond to disturbances, identify new opportunities, and allocate resources to bring innovations or changes into fruition.
Other roles included in Mintzberg's framework, such as the leader (interpersonal category), monitor, disseminator, and spokesperson (informational category), serve different functions that are essential to management, but they are not primarily decision-making roles.