Answers

2015-07-14T18:44:31+05:30
Valleys are along rivers because they act as the support for the sediments and rocks to come in from...and they stop the water floying out from all the direction and make a specific path

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2015-07-14T21:05:56+05:30
Bcoz early settlers settled along river banks in order to increase agriculture and food grain production for themselves
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