Q.The main source of irrigation in Tamil Nadu is :

Tamil Nadu's agriculture is shaped by its varied agro-climatic regions. Paddy (rice) is the staple food crop, grown most intensively in fertile, well-irrigated river deltas such as the Cauvery delta around Thanjavur (long known as the state's "rice bowl"), while sugarcane, cotton, groundnut, and pulses/millets are grown in other regions depending on soil and water availability. Irrigation in the state comes from a mix of sources: the Cauvery river system (via canals and anicuts) for the delta region, traditional tank irrigation (a chain of interlinked small reservoirs storing monsoon rainfall) especially in the non-delta districts, and groundwater as a growing supplem …