Question

Winnowing food grain​

Answer 1

Explanation:

Winnowing is an agricultural method developed by ancient cultures for separating grain from chaff. ... In its simplest form, it involves throwing the mixture into the air so that the wind blows away the lighter chaff, while the heavier grains fall back down for recovery.

Answer 2

Answer:

blow a current of air through (grain) in order to remove the chaff.