Question

how are synthetic fibres made __________​

Answer 1

Here is your answer,

Synthetic fibers are made from synthesized polymers of small molecules. The compounds that are used to make these fibers come from raw materials such as petroleum based chemicals or petrochemicals. These materials are polymerized into a chemical that bonds two adjacent carbon atoms.

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Answer 2

Answer:

Synthetic fibres are man-made fibres, most of them are prepared from raw material petroleum called petrochemicals. They include nylon, acrylics, polyurethane, and polypropylene. Millions of tons of these fibres are produced all over the world each year.

Explanation:

if this question was asked in fill in the blanks just write "petroleum"