What I have learned are given below :

(a) : I have learned the history of Denim, Journey of some brands like Blue Jeans and some trends, classification of Denim fabric from the lecture.

(b) : I want to learn more regarding the lecture contents is a bit more about the journey of some various brands.

(c) : I've understood all the contents that have been covered by you in this lecture. 

Thank you, sir for teaching us in well procedure.