Ganga-Brahmaputra delta is called the 'food bowl of India' because:
(i) Ganga-Brahmaputra delta produces food grains like rice, wheat, maize, pulses, etc.
(ii) It comprises of fertile flood plains and, the nutrient rich alluvial soil for the growth of food grains.
(iii) Favourable climatic conditions of this region makes it rich in food crops. That's why it is known as the food bowl of India.