'Functional regions are not only the description of generalisation of characteristics, but also are the result of logical relationship of the theory of process and generalisation'. This definition was given by
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Whitlesy
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Harbertson
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Hetner
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Hartshorne
B
Correct answer
Explanation
Harbertson provided this comprehensive definition of functional regions, emphasizing that such regions are not just descriptive generalizations but emerge from logical relationships between processes and their spatial expressions. This theoretical approach links process geography with regional classification.