Which sentence from the text best demonstrates how Seo-Jun's actions develop the theme of the importance of holding on to cultural traditions?

"He got by in school, but he didn’t apply himself."


"Then he headed out the back door of the truck."


"Without saying a word, he climbed back into the food truck."


"Seo-Jun finished chopping a stalk of scallions and put down his knife in order to glance at his phone."