Final answer:
Global cities, according to Central Place Theory, occupy the top level of the urban hierarchy, offering high-order goods and services that drive the global economy.
Step-by-step explanation:
In the hierarchy of Central Place Theory, global cities such as New York, London, and Tokyo are situated at the top due to their ability to offer exceptionally high-order goods and services. These cities maintain dominant position in the urban hierarchy and serve as core areas of economic activity, driving the global economy. According to Walter Christaller's Central Place Theory, the urban landscape organizes itself in a geometric pattern based on the availability of goods and necessity of travel.
Global cities have situation advantages that aid their growth and develop into market centers that provide a plethora of services. Areas like Kansas, with few natural advantages for trade, still followed a predictable pattern of smaller towns and cities orbiting around larger central places, illustrating the geographical suitability of the Central Place Theory. Today, these global cities continue to evolve and cater to large thresholds, housing businesses and industries that are not found in smaller cities or towns.