Question

why bihar is not developing ?

Answer 1

because the people are not interested in developing it and them
they want the life like that how it is going and are not even trying to be better

Answer 2

Because the people don't know the benefits of modernisation for their future.

The main reason-

first, the state has ridden an agricultural growth wave in the last decade, like Gujarat. However, it’s a reversal in industrial growth that could be a key reason for growth numbers leaping up.

Second, despite its economic successes, in the same period, Bihar has failed to bring about similar changes in poverty reduction, per capita income and literacy. In absolute numbers, the number of poor in Bihar has increased in the last 5 years, unlike in most other states.