Answer:
Relational Region
Step-by-step explanation:
From the list of given options, the option that correctly answers the question is the relational region because it is not a type or an example of a region.
Other options such as the perceptual region which is a kind of region that is perceived or thought to have existed or the formal region which describes a region where all localities of that region share one or more common features and the functional region which is characterized by a central point of communication, are types of region.