Question

Why do burrs appear on sweaters?

Answer 1

Answer:

The materials are made up of different fibers , when these fibers either break or shorten it forms a tangled mass of small ball like structures which are called as Burrs.

So due to this burrs are formed on sweaters and shawls.

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Answer 2

Explanation:

it's because the sweaters are made up of a special kind of material, which has many fibers. The Fibers get short/long and fuzzy which, as a result, makes burrs appear in sweaters