Define the terms:

(i) harvesting,

(ii) threshing, and (iii) winnowing.

(i) Harvesting: The cutting and gathering of mature food crop like wheat or paddy is known as harvesting.

(ii) Threshing: The process of removal of the grains of harvested crop from the chaff is called threshing.

(iii) Winnowing: The process in which grains are separated from chaff with the help of wind is called winnowing.