_______ is used to separate fine sand from coarse sand in construction sites.

Winnowing

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Threshing

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Churning

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Sieving

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Solution

The correct option is D Sieving
Fine sand and coarse sand are not large enough to separate by handpicking. Therefore, a sieve/mesh containing small pores is used to separate mixtures containing small sized components.
Upon using a sieve fine sand passes through the pores, while coarse sand stays on the top of the sieve. This process of separation where mixture containing small sized components are separated is known as sieving.

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