Concept:Urban settlements are best identified by a clustered, high-density pattern known as nucleated settlement.
Explanation:An urban settlement is a town or city where a large number of people live closely together within a relatively small area.
The inhabitants are mainly involved in secondary activities like manufacturing and construction, and tertiary activities like trading and services.
A nucleated settlement has houses and buildings grouped compactly around a central feature such as a market square, road junction, or civic centre.
Urban areas take this form because land is expensive and scarce, so structures are concentrated rather than spread out.
In contrast, an isolated settlement consists of a single, scattered home, while a dispersed settlement has widely separated buildings.
These latter patterns are characteristic of rural areas, where land is plentiful and farms are far apart.
Therefore, the urban type of settlement is best described as nucleated.
Answer:The correct option is nucleated, which corresponds to option C (option D repeats the same term).