Describe any five features of extensive commercial grain farming in the world.
 
Extensive commercial grain farming involves large-scale production of grains. The features are: 
Large landholdings: Practiced over vast areas, mainly in temperate grasslands. 
Mechanized farming: Uses advanced machinery for sowing, harvesting, and storage. 
Low labor input: Relies on machines rather than manual labor. 
Export-oriented: Produces surplus grain for export markets. 
Climatic dependency: Requires specific climatic conditions like moderate rainfall and long growing seasons. 
In the given reaction sequence, the structure of Y would be: