Question

5. Why is rice the main crop cultivated in the Ganga-Brahmaputra basin?
6. There are many big cities located along the banks of the River Ganga. Explain.
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Answer 1

because rice is a water drop it needs more water to grow that's why rice is grown in Ganga Brahmaputra basin is mainly.

2.i am not sure about my answe for q.6

Answer 2

5. Rice is the main crop cultivated in the Ganga-Brahmaputra basin because of the climate and also the fertile and rich alluvium soil is present which is best for the growth of rice.

6. Many cities are located along the banks of river Ganga because it provides water to people.It also supports agriculture due to fertile and rich land.