Shyam lives in a region where the rainfall is less. Suggest him a crop that can grow in such regions.
Regions which receive less rainfall can grow millets like Jowar, Bajra, Ragi etc. These crops require considerably less amount of water to grow when compared to rice and wheat crops.
Cotton is one of those crops which require a lot of water for growing as well as processing.
Hence, Bajra is the correct answer.