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Question

Consider the following statement regarding floods: When the snow melts, the river is inundated with more water than it can hold. And if there is any obstruction or silting, the capacity of the river ____ and it leads to a flood.

A
increases
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B
decreases
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C
remains stable
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D
fluctuates
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Solution

The correct option is B decreases
When the snow melts, the river is inundated with more water than it can hold. If there is any obstruction or silting, the capacity of the river decreases. This also results in a situation where the river cannot hold all that excess water during heavy rain. So, in both cases, when the river gets more water than it can hold, there is an overflow and this leads to floods.

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