Answer: They have larger ranges and thresholds.
Explanation: The rank-size rule defines range as the longest distance that a customer will travel to purchase a good or service. Threshold is the minimum market needed to support the supply of a product or service. It is assumed that customers which travel longer distances to purchase a higher-order good or service, and a provider of such goods and services will require a larger customer base to make a profit. Thus, higher-order services have larger ranges and thresholds.
4. Would be A
5. Would be D
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Well its all due to Green house gasses produced through factories and automobiles, with the abundance of the world, driving, fly, and burning gas and oil on the whim we are playing a major role in this and unless a new technology that can surpass oil and natural gas we are slowly killing ourselves and the world.