Question

Wool is grouped according to its length,colour, texture and ease of dyeing

Answer 1

yes, because they can sell the sorted will in different prices as the texture,size and colour differs
I am in 7 class so I don't know more about it,
hope you liked it
bye

Answer 2

yes your question is absolutely right.
if the wool is long and thick,colour quality,
it has be more price according to its qiality