Which of the following processes is used to separate grain seeds from their stalks?

Correct option is B

The correct answer is (b) Threshing.
Explanation:
● Threshing is the process of beating stalks to free the grain seeds.
● It can be done manually or by using machines like "Threshers" or "Combines".
Information Booster:
● Winnowing is used to separate heavier seeds from lighter chaff using wind.
● Handpicking is used for large-sized impurities like stones in wheat.
● Sieving separates particles of different sizes using a mesh/sieve.
Additional Knowledge:
● Handpicking – Used when the quantity of impurities is small.
● Winnowing – Based on the difference in weight of components.
● Sieving – Commonly used in construction and kitchens.