Question

what did the old towns and cities decline

Answer 1

Shrinking cities or urban depopulation are dense cities that have experienced notable population loss. Emigration (migration from a place) is a common reason for city shrinkage. Since the infrastructure of such cities was built to support a larger population, its maintenance can become a serious concern. A related phenomenon is counter urbanization.

Answer 2

the ans is Towns and cities have a long history, although opinions vary on which ancient settlement are truly cities. The benefits of dense settlement included reduced transport costs, exchange of ideas, sharing of natural resources, large local markets, and in some cases amenities such as running water and sewage disposal.
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