Explanation:

- Kuruwa: This is a traditional method of cultivation in Jharkhand, especially used by tribal communities. It involves clearing patches of forest, burning the vegetation, and using the ashes to fertilize crops.

- Khil: This refers to a shifting cultivation practice, but is mostly linked with the Himalayan region, not Jharkhand specifically.

- Kumari: This form of cultivation is commonly seen in the Western Ghats, mainly in Kerala and Karnataka, not in Jharkhand.

- Valre: This term does not relate to Jharkhand’s cultivation methods and is not recognized in this context.

Correct Answer: Option 1 - Kuruwa