Explanation

Option D is correct: Himalayan nettle (Girardinia diversifolia) is an indigenous plant found in the temperate and subtropical regions of the Himalayas:

– It yields a strong, smooth, and lightweight natural bast fiber that serves as an eco-friendly and biodegradable substitute for synthetic textiles, cotton, and linen.
– In mountainous regions of Uttarakhand and Nepal, community-based enterprises harvest and process this fiber to produce yarns, bags, carpets, and high-end sustainable fashion garments, creating livelihood opportunities in remote mountain villages.

Therefore, it is a sustainable source of textile fibre — Option D.