The urban planning of the Harappan civilization shows remarkable uniformity in terms of the layout of cities, drainage systems, and construction materials. This uniformity is best explained by the presence of a central authority that could enforce standardized planning and construction regulations across the different Harappan cities.
1. Centralized Control:
Archaeological evidence suggests that the cities of the Harappan civilization, such as Harappa and Mohenjo-Daro, were planned meticulously with grids, uniform streets, drainage systems, and standardized brick sizes. Such uniformity across cities suggests the presence of a central authority that governed the urban planning process and ensured consistency.
2. Lack of Evidence for Other Options:
- Option (B): While city-states might have some level of autonomy, the uniformity in planning points to a more centralized system. - Option (C): The Harappan civilization was not organized around tribal leadership but was highly urbanized, with a focus on trade and organized governance. - Option (D): The nomadic governance system does not explain the centralized and planned nature of Harappan cities.
Conclusion:
Thus, the best explanation for the uniformity in urban planning across Harappa is the presence of a central authority that oversaw and standardized urban development.