The correct answer is: d) All of the above
a) Expanding cultivation in drought-prone areas
Irrigation systems can help to expand cultivation in drought-prone areas by providing water to crops that would otherwise not be able to grow. This can help to increase food production and improve the livelihoods of farmers in these areas.
b) Improving water-use efficiency
Irrigation systems can help to improve water-use efficiency by delivering water directly to the roots of plants, where it is most needed. This can help to reduce water losses due to evaporation and runoff.
c) Reducing groundwater depletion
Irrigation systems can help to reduce groundwater depletion by using water more efficiently. This can help to ensure that groundwater resources are available for future generations.
In conclusion, developing efficient irrigation systems is crucial for expanding cultivation in drought-prone areas, improving water-use efficiency, and reducing groundwater depletion.