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Answers
Answer:
a becouse impurities r present in it so v have to purify water before drinking
b Potable water, also known as drinking water, comes from surface and ground sources and is treated to levels that that meet state and federal standards for consumption.
c Benefits of Dams. Dams provide a range of economic, environmental, and social benefits, including recreation, flood control, water supply, hydroelectric power, waste management, river navigation, and wildlife habitat
d It only helps to increase the water level thus facilitating the digging of wells.
e VEGETABLES & FRUITS are called protective foods. Our body requires Vitamins and Minerals for various vital processes of life and for formation of blood, bones and teeth. These VITAMINS & MINERALS though needed in small quantities are very important for regulating various bodily function.