Option 1 -> Horticulture refers to cultivation of fruits, vegetables, and ornamental plants in gardens, not shifting cultivation practices.
Option 2 -> Slash and burn agriculture involves cutting and burning forest vegetation to clear land for temporary cultivation before moving to new plots - exactly what Jhumming is.
Option 3 -> Commercial farming is large-scale production for profit and markets, whereas Jhumming is primarily subsistence-based cultivation.
Option 4 -> Intensive subsistence farming maximizes output from small fixed plots with high labor input, while Jhumming is extensive and involves shifting between different land parcels.
Hence, Option 2: Slash and burn agriculture -> Jhumming is a traditional shifting cultivation practice in north-eastern India where forest patches are cleared by cutting and burning, crops are grown for 2-3 years until soil fertility declines, then the land is abandoned for natural regeneration while farmers shift to new areas -> correct