Question

Why food items made of rice are mostly eaten in West Bengal or Tamilnadu

Answer 1

Because that's where mostly paddy fields are located. So when they have majority of food supply being rice, naturally food items made from rice becomes their staple food.

Hope it helps !

Answer 2

it is eaten mostly in west bengal or tamil nadu because in that region , rice is grown in fields so ya as well as in uttar pradesh and bihar there ppl eat a lot of wheat coz in that region there r wheat grown in the fields