Answer:
Functional Region: is a trade, route, transportation, or a shopping center can be a functional region. For example New York City.
Formal Region: Is an Area that is inhabited by people who have one or more characteristics in common. For example Europe, U.S. , Africa, and Canada.
Perceptual Regions: A perceptual region refers to the feelings and main ideas people have about a place.
Is this what you were looking for?