Concept:
Urban geography categorizes spatial distribution models into two main types: models that study the internal land-use structure *within* a single city, and models that study the regional network and distribution of multiple cities *across* a larger geographic area.
Step-by-step Explanation:
Let us review the core purpose of each listed theory:
• Concentric Zone Theory (Option A): Developed by Ernest Burgess, this model describes the internal growth patterns of a single city using concentric rings spreading outward from a central business district.
• The Central Place Theory (Option B): Formulated by Walter Christaller, this regional economic theory explains the number, size, and spatial distribution of different cities and towns within a larger regional network. Using a geometric grid of hexagons, it explains why major cities form at regular intervals to provide specialized services, while smaller towns distribute around them to provide everyday goods, making this the correct answer.
• Multiple Nuclei Theory (Option C): Developed by Harris and Ullman, this model describes a single city's internal land use growing around several independent commercial nodes rather than a single core.
• Sector Theory (Option D): Developed by Homer Hoyt, this model charts the internal layout of a single city expanding outward along major transportation corridors.