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Rayon is different from synthetic fibres because

Explanation

**Step-by-Step Solution:**

1. **Understanding Rayon**: Rayon is a type of fiber that is classified as a semi-synthetic fiber. This means it is derived from natural sources but undergoes chemical processes to create the final product.

2. **Source of Rayon**: Rayon is made from purified cellulose, which is obtained from wood pulp. This is a key point that differentiates rayon from fully synthetic fibers, which are made entirely from synthetic chemicals.

3. **Definition of Synthetic Fibers**: Synthetic fibers, such as nylon and polyester, are entirely man-made and do not originate from natural materials. They are produced through chemical processes from petrochemicals.

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