Explanation:

- Extensive agriculture refers to a farming system where large areas of land are cultivated with minimal labor and inputs. The focus is on using vast land expanses to increase output, rather than intensifying production methods.

- __Extensive commercialisation__ refers to the transformation of agricultural activities from subsistence farming to producing for sale in the market. It involves selling agricultural produce rather than just using it to meet personal consumption needs.

- Shift to monetary economy in India indicates a broader economic transition from barter systems or self-sustenance to a market-oriented economy where goods and services are exchanged for money. This shift influences many sectors, not only agriculture.

- All of the above would imply that all three options equally describe the shift, but they are distinct concepts addressing different aspects of economic change.