Q.1: How have rivers served men? Ans: Rivers have served men in the following ways: They have served as trade route before the road and railways were constructed people carried on trade by boats and ships. Since rivers have water in abundance man through digging canals to obtain water from river for irrigation. Q.2: What is a barrage? What purpose does it serve? Ans: A barrage is a kind of a well which blocks the flow of water. It has gates, through which the water is allowed to pass in a limited quantity. Its aim is to control the flow of water in the flood seasons and store it in such a manner that the canal gets water through out the year. In this way, farmers can be given water for their fields. Life and property canals can be protected from flood by stopping the flow of water. Q.3: Why were most of the towns in ancient times build near rivers? Ans: Most of the towns were built near river because river played very important role in the life of...
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