Which one of the following ancient towns is well-known for its elaborate system of water harvesting and management by building a series of dams and channelizing water into connected reservoirs?

1. The question asks to identify an ancient town specifically known for an elaborate system of water harvesting and management, involving dams and connected reservoirs. 2. Dholavira (A), located in the arid Rann of Kutch in Gujarat, is exceptionally well-known for its sophisticated water management system from the Harappan period. Archaeological findings reveal a complex network of large reservoirs, check dams, and channels designed to collect and store scarce rainwater. This system is considered a hallmark of the site's planning. 3. Kalibangan (B), in Rajasthan, is known for its ploughed fields, fire altars, and distinct town planning, but not primarily for such an elaborate water harvesting system as found in Dholavira. 4. Rakhigarhi (C), in Haryana, is one of the largest Harappan sites with significant findings, but Dholavira's water management is more uniquely prominent. 5. Ropar (D), in Punjab, is another Indus Valley site, but it is not specifically distinguished for the type of elaborate water harvesting system described. Therefore, Dholavira is the most appropriate answer.