Which of the following methods of water conservation broughtprosperity in Ralegan Siddhi?

Class 12th Geography, Question -Which of the following methods of water conservation broughtprosperity in Ralegan Siddhi?

These are the options for the question :Which of the following methods of water conservation broughtprosperity in Ralegan Siddhi?

(a) Rainwater harvesting
(b) Watershed development
(c) Groundwater recharge
(d) Construction of dams.

The correct answer is -(b) Watershed development