Укажите свойство металлов, которое используется в кузнечном деле 1) теплопроводность 2) металлический блеск

My favorite book it is The Adventures of Baron Munchausen.I like it book,because it is an interesting.I read it when I have free time.I advised my friend to read.I read this book and I really like it because I like adventure and I'm very fond of, as a hero, Munchausen.His stories are very interesting.