Final answer:
The sequence from the smallest to the largest in the urban hierarchy is Hamlet, Village, Town, City, with hamlets being the smallest rural communities and cities being the major urban centers.
Step-by-step explanation:
The urban hierarchy is a system that classifies settlements from the smallest to the largest. According to this classification, the sequence from the smallest to the largest is Hamlet, Village, Town, City. A hamlet is the smallest rural community, often with few amenities. A village is larger, providing more services than a hamlet but still limited. Town refers to a larger population center with more services and amenities, often being a hub for the surrounding rural areas. A city is larger than a town and is a major urban center with a large population and a wide array of services and economic functions. In some cases, megacities or metropolises represent even larger urban areas, complete with high-order goods and services that are not found elsewhere.