Some estimates indicate that the amount of the world's fresh water that is stored as groundwater may be close to:
a) 98%.b) 57%.c) 10%.d) 1%.e) 0.01%.

so here correct option is a) 98%

Explanation:

solution

Water is most essential compound for all living thing and about 70% of Earth surface is covered by ocean and where ground water is that water that is found beneath surface of Earth in 100 % saturation conditions

and according to National Ground Water Association there is approx 98 percent fresh water is available in groundwater

and water in ground travel by the pores in the soil and rock and weathered area of bedrock

so here correct option is a) 98%

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