(a)- (ii) Wool.

Sweater is made of wool by knitting process.

(b) -(iii) Ginning.

From cotton bolls, cotton is usually picked by hand. And then cotton fibres are separated from the seeds by combing. This process is called ginning of cotton.

(c)- (i) Cotton.

Dhoti is made of cotton fibres by weaving process with the help of looms.

(d)-(iv) Jute

Gunny bag is made up of jute.