Question

5) The old method used even at home to clean grains-​

Answer 1

Explanation:

sieving is the old method used even at home to clean grains...

Hope its helpfull...

Answer 2

Winnowing is the old method used to separate grains from chaff.

Explanation

In its simplest form it involves throwing the mixture into the air so that the wind blows away the lighter chaff. The heavier grains fall back down for recovery. This method is called "wind-grading".Other methods include using a winnowing fan (a shaped basket shaken to raise the chaff).Yet another is using a tool (a winnowing fork or shovel) on a pile of harvested grain.