Harvesting is the process of cutting agricultural plants once they have matured. It is accomplished by cutting or pulling agricultural plants close to the ground.
Threshing is the process of separating grains from the chaff.
Winnowing is the process of separating grains from the chaff using the wind.
Final Answer : Harvesting refers to the act of gathering a crop. Threshing is the process of separating grain, such as maize or another crop, by flaid. Winnowing is the process of blowing air through grain to remove chaff.