Question

4. Useful in making sweaters cheaper than wool.
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Answer 1

Answer:

iwool is used to make sweater than cheaper

Answer 2

Answer:

I think it must be acrylic.

Explanation:

Acrylic is a synthetic fiber which resembles wool and has most of the properties of wool. It is cheaper than wool. It is moth resistant also. So, Acrylic is generally preferred over wool.