Explanation:

- Shifting cultivation is a form of agriculture where a piece of land is used for a period, and then the farmer moves to a new area to allow the initial land to regenerate.

- Option 1: Chena - This term refers to shifting cultivation in Sri Lanka.

- Option 2: Ladang - This is the term used in Indonesia and Malaysia for shifting cultivation.

- Option 3: Jhum - This is the term for shifting cultivation in northeast India. Farmers clear a patch of forest, cultivate it, and then leave it to regenerate.

- Option 4: Logan - This is not typically associated with shifting cultivation practices.

Correct Answer: Option 3 - Jhum

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