What is a significant characteristic of a functional zone?

A significant characteristic of a functional zone is that it serves a particular type of activity. Functional zones are designated areas within an urban environment where specific activities occur, such as residential, commercial, industrial, or agricultural functions. This specialization allows for efficiency in urban planning and development, ensuring that areas are tailored to support specific needs.

For instance, business districts are functional zones where commercial activities, like retail and services, are concentrated, while residential zones are specifically designed for housing. This characteristic of serving a particular type of activity enhances the organization of space within a city and facilitates effective land use.

In contrast, other options suggest limitations or expansions that do not align with the definition of a functional zone. Being solely residential would imply a lack of diversity in activity, while unregulated zones would not have the defined purpose that characterizes functional zones. Offering multiple services suggests a blending of functions rather than a focused, specific activity which is central to the concept of functional zoning.