Final answer:
The type of organizational structure defined by specific service-contributing departments like HR and marketing is a functional structure, a commonly used traditional organizational form.
Step-by-step explanation:
The type of organizational structure where departments are defined by the services they contribute to an organization's overall mission, such as marketing and sales, operations, and HR,
is known as a functional structure.
This traditional structure has a clear division of labor, with each department focusing on a specific area of expertise, much like how a major grocery store is organized into various departments like dairy, meats, produce, and so forth. While a functional structure is common,
modern workplaces are shifting towards more flexible team-based structures and flat organizational models to adapt to changes in technology, globalization, and workplace demographics.