Dams and reservoirs can help in:

Flood control
Drought mitigation
Irrigation
All of the above

The correct answer is: d) All of the above

Dams and reservoirs can help in flood control, drought mitigation, and irrigation.

  • Flood control: Dams and reservoirs can store water during periods of high rainfall, which can then be released slowly during periods of low rainfall to prevent flooding.
  • Drought mitigation: Dams and reservoirs can store water during periods of high rainfall, which can then be released during periods of low rainfall to help mitigate the effects of drought.
  • Irrigation: Dams and reservoirs can be used to store water for irrigation, which can help to increase crop yields.

In addition to these three main benefits, dams and reservoirs can also provide other benefits, such as hydroelectric power generation, recreation, and fish and wildlife habitat. However, dams and reservoirs also have a number of negative impacts, such as the displacement of people and wildlife, the loss of wetlands, and the alteration of river ecosystems.