2) Silk is a kind of fibre
a) semisynthetic b) synthetic c) Animal d) Vegetable​

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Animal fibre

I hope this helped!

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- Zack Slocum

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 c) Animal

Explanation:  It is a protein based fibre so classified as animal fibre.  Vegetable fibers are cellulose based.

the maximum mass of nh3 is nh3 in grams

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