Question

Which of the following is not a plant fibre?
A. Cotton
B. Coir
C. Sunn hemp
D. Silk

Answer 1

Hint: The fibres are obtained by plants and also there are also some fibres that are obtained from other sources i.e., by the rearing of animals. The plant fibres are used for packaging, making fabrics, etc.

Complete answer:Fibre is the basic unit of fabrics. A fabric is formed by knitting or weaving fibres. Fibres are of two types: natural and synthetic. As natural fibres are obtained from plants and animals. On the other hand, synthetic fibres are man-made.
-Option A, cotton, which is a plant fibre. Cotton is obtained from the cotton plant. Cotton fibre is used to make a variety of clothes. The fibre is enormously famous and consumed in tropical regions, experiencing hot and humid summers.
-Option B, coir, which is again a plant fibre. The fibre coir is obtained from coconut trees. The outer husk of the coconut has this fibre. It is used in making matting and ropes.
-Option C, sunn hemp is a plant that provides the hemp fibre, known by all. The hemp fibre is used in textile, clothing, shoes, and rope industries among others.
-Option D, silk is given. As silk is a precious fibre obtained from the cocoon of silk moths. The moths are fed mulberry leaves. This fibre is used to make vibrant clothing like sarees etc.
So, the correct option is option D, as it is obtained from rearing moths.

Note: It should be noted that the process from fibre to fabric is a tedious one. The fibre is first converted into yarn by the process of weaving or knitting. The woven material is then dyed, embellished, and finished so as to bring us the final product. A lot of manpower and machines are used to operate the same. The textile and clothing industries are one of the most booming industries across the world.