a. ans: I learned  from this lecture -.  1.History of denim, timeline of jeans history, journey of blue jeans   2. Trends of denim, characteristics of denim fabric.                    

3.Differentiate between denim and twill?

b. what is the price of jeans based on fashion,if it goes up then why the price goes up and how it goes up?

c.I have understand in this lecture.