A
Winnowing
B
Sieving
C
Handpicking
D
Threshing
Solution:
Sieving is the process of separation of fine particles. The process by which fine particles are removed by passing them through the holes of the sieve is known as sieving. The more significant impurities remain on the sleeve. This method separates husk and stones from the wheat in the flour mills. Therefore, this method is used to distinguish bigger particles from smaller ones. Winnowing is the method in which heavy particles are separated from lighter substances with the help of wind. Hand-picking is the method in which particles in the mixture can be separated by just picking them out with the help of a hand. Threshing is the method where the separation of grains or shells takes place from the plants.
