A) Yes I

B) Yes Mam.

C) I Understood MAM.

D) Because, 

• Friction holds the fiber in a sliver and hence material does not break due to self weight.

• Friction helps in the drafting and drawing process.

• Uniform tension can be maintained in winding and warping because of friction.

• Friction helps in twisting during spinning.

• Friction modifies the luster and appearance of a cloth

• Friction makes more clean yarn.

So friction is important in the textile industry.