Development and impact on desert areas is mainly due to Select one:

a. air conditioning.

b. roads and highways.

c. modern irrigation.

d. None of these are correct.

Answer is C. Modern irrigation.

Explanation:

The word 'irrigation ' means the process of supplying water or watering of land in preparation for planting and watering of planted crops to survive.

Modern irrigation involves the construction of hoses, channels and canals. This is done so that water will be available through out the seasons for the crops, and water will be supplied to areas where there is scarcity of water.

Irrigation is very important because it prevents famine, improves water condition in the soil by dissolving nutrients for plant use.