Andhra Pradesh promotes food security through:

Crop diversification
Irrigation development
Post-harvest management
All of the above

The correct answer is: d) All of the above

Andhra Pradesh promotes food security through a variety of measures, including crop diversification, irrigation development, and post-harvest management.

Crop diversification is the practice of growing a variety of crops in a given area. This helps to reduce the risk of crop failure due to pests, diseases, or weather conditions. It also helps to improve soil health and prevent the depletion of nutrients.

Irrigation development is the process of providing water to crops through artificial means. This can be done through canals, wells, or other methods. Irrigation helps to increase crop yields and improve the quality of crops.

Post-harvest management is the process of handling and storing crops after they have been harvested. This includes activities such as drying, cleaning, and packaging. Post-harvest management helps to prevent the loss of crops due to pests, diseases, or spoilage.

All of these measures help to ensure that Andhra Pradesh has a reliable food supply.