Question

the bulk of rainfall in India is concentrated over a few month

Answer 1

The rainfall received by India is largely due to the south-west monsoon winds. The duration of the monsoon is between 100 to 120 days. Hence, the bulk of rainfall received by the country is concentrated over a few months.

Answer 2

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Rainfall is dependent on the South West Monsoon winds, it rapidly progresses and covers large swathes of the country by July.