Which of these processes are used to separate husk from grains?

Answer: A. Threshing and Winnowing

Threshing is a process done manually or by machines, in which grains are beaten to separate them from husk. Winnowing is a process in which the threshed grains are blown with wind, so that the heavier edible part falls down into a pile, while the lighter inedible husk blows away and falls down in a different pile, where it can be used for different purposes. Sedimentation and decantation, filtration and reverse osmosis (RO) are processes used to purify water.

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