Which part of the jute plant is used for getting jute fiber?

Which set of substances is not used for making fibers?

Boojho went to a cloth shop. There he found a fabric which was smooth to touch, had vibrant colour and shine. The fabric could be

Yarn is woven to get fabric using

Beera is a farmer. His field has black soil and the climate is warm. Which fiber yielding plant should he grow in his field?