How is the effect of monsoon seen on India's river systems?

Correct answer: Rainfall can increase river flow and flood possibility

The direct answer is A: rainfall can increase river flow and the possibility of floods. Monsoon rain enters rivers directly and also runs over the land into streams and river channels. Step by step, heavy or prolonged rain increases the amount of water reaching a river; the river level and flow rise; if the channel cannot carry all the water, flooding may occur. The effect differs by place, soil, drainage, and rainfall amount. Option A is correct because it states a possible and common monsoon effect. Option B is wrong because rivers are strongly connected with rainfall and runoff. Option C is wrong because monsoon rain generally adds water, although a later dry season may reduce flow. Option D is wrong because river flow is not decided only by the Himalayas; rainfall, snowmelt, tributaries, and groundwater also matter. Memory cue: more monsoon rain usually means more runoff, river flow, and flood risk.