The method of separating the grain from the stalk is called
A. Threshing
B. Handpicking
C. Winnowing
D. Sieving

Hint: Cultivation of crops involves several methods and followed in the order mentioned is; preparation of soil, sowing, adding nutrition by adding manure and fertilizers, irrigation, protecting crops from weeds, harvesting and then finally storage.

Complete step-by-step solution:
Threshing : - The process to separate grain from (corn or other crops), typically with a flaid or by the action of a revolving mechanism.
Handpicking :- The method in which substances in a mixture can be separated by just picking them out with the help of hand form the mixture is known as hand picking method.
Winnowing :- Process in which we below the current of air through (grain) in order to remove the chaff.
Sieving :- Sieving is defined as a method in which two or more components of different sizes are separated from a mixture on the basis of the difference in their sizes. Thus, it cannot separate two substances in a mixture which have the same size.
The method of separating grain from the stalk is called threshing. In it the stalk was beaten to get grain. It was beaten on hand rock.

Option (A) is the correct answer.

Note: During the threshing process, stalks are converted into very small pieces termed as hay which is used for feeding cattle. A motorised machine, thresher is used for the threshing process.