1. Cotton, wool, silk are examples of ____________ .
(a) Plant Fibres
(b) Animal Fibres
(c) Natural Fibres
(d) Synthetic Fibres

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Detailed Solution

The correct answer is (c) Natural Fibres.

Natural fibres are fibres obtained from natural sources, which can be either plants or animals.

Cotton is a plant fibre, as it comes from the cotton plant.
Wool is an animal fibre, as it is obtained from the fleece of sheep. 🐑
Silk is also an animal fibre, produced by silkworms. 🐛

Since the list includes fibres from both plant (cotton) and animal (wool, silk) sources, the most accurate and inclusive category is natural fibres. The other options are incorrect because:

(a) Plant Fibres: This is incorrect because wool and silk are from animals.
(b) Animal Fibres: This is incorrect because cotton is from a plant.
(d) Synthetic Fibres: These are man-made fibres like polyester and nylon, which are created through chemical processes.

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