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I] Locate and name the water reservoirs ...

I] Locate and name the water reservoirs in figures a and b.
II] Which has an advantage over the other and why?

Text Solution

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i] a] pond b] underground water body.
ii] Underground water bodies are at an advantage since:
a] Water does not evaporate by sunlight, does not support the growth of pathogens [mosquitoes], does not get contaminated by human and animal waste.
b] They serve as a source of moisture for crops over a wide area.
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