Readthe following extract carefully and answer the questions thatfollow :Irrigating trees and fieldsThisis an excerpt from the Baburnama that describes the irrigation devices the emperorobserved in Northern India : The greater part of Hindustan country is situated on level land. Many though its towns and cultivated lands are, it nowherehas running waters . . . For . . . Water is not at all a necessity in cultivating crops and orchards. Autumn crops grow by the downpour ofthe rains themselves , and strange it isthat springcrops grow even whenno rains fall. (However) to young trees water is made to flow by means of buckets or wheels . . . In Lahore, Dipalpur (both in present-day Pakistan) and those other parts, people water by means of a wheel. They make two circles ofropelong enoughto suitthe depths ofthe well, fix strips of wood between them,and on these fasten pitchers. The ropes with the wood and attached pitchers areput over the wheel-well. At one end of the wheelaxle a second wheelis fixed , and close to it another on an upright, axle. The last wheel the bullock turns, its teeth catch in the teeth of the second (wheel), and thus the wheel with thepitchers is turned. A trough is set wherethe waterempties from the pitchers and from this the water is conveyed everywhere. In Agra, Chandwar, Bayana (all in present-day Uttar Pradesh) andthose parts again, people water with a bucket ... At the well-edge they set up a fork of wood, having a rolleradjusted between the forks, tie a rope to a large bucket , put the rope over a roller, and tie its other end to the bullock. One person must drive the bullock, another empty thebucket.1. Explain the irrigation technology as observed by the Emperor. 2.What was the necessity of irrigation ?3. Explain any three factors which are responsible for the expansion of agriculture in India.