Differentiate between the following:

Handpicking and sieving

Give reason: A mixture can be separated by sieving, but not by winnowing or handpicking.

Give reason: Sieving wheat flour is not advisable.

Give reason:

If there is no wind blowing, the process of winnowing cannot be undertaken.

Give reason:

If water can be purified by filtration then why do we use the method of distillation?

Give reason: We do not pluck seeds of cereal plants like we pluck fruits from a plant.