The correct answer is: Poverty, lack of access to markets, and natural disasters.
Poverty is a major cause of food insecurity in Bihar. The state has a high poverty rate, and many people do not have enough money to buy food. This is especially true in rural areas, where there are fewer job opportunities.
Lack of access to markets is another major cause of food insecurity in Bihar. Many people in the state live in remote areas, and they do not have easy access to markets where they can buy food. This is especially true for people who live in tribal areas.
Natural disasters are also a major cause of food insecurity in Bihar. The state is prone to floods, droughts, and other natural disasters. These disasters can destroy crops and livestock, making it difficult for people to get food.
Excess food production, focus on exporting food, and neglect of traditional agriculture are not major causes of food insecurity in Bihar. The state does not produce enough food to meet its own needs, and it does not export much food. Traditional agriculture is still practiced in many parts of the state, and it is an important source of food for many people.
In conclusion, poverty, lack of access to markets, and natural disasters are the major causes of food insecurity in Bihar.