How does Richard E. Kim use imagery in Lost Names: Scenes from a Korean Boyhood?

Imagery:

"I look up. In the bright moonlight that bathes his face, I see tears shining in his eyes. I grip his hand and I, too, am trembling. I can't control the violent shaking. There is a light tap on my shoulder, and my father, looking into my eyes, says, 'It's all right. It's over.' Without a word, I nod my head, feeling the tremor within me subsiding. He says quietly, 'It is your world now.' I put my arm around him."

"Along with my classmates, I shoveled all day, digging up rubbery red clay, to a depth of four feet, barely clearing a ten- by twenty-foot sector, which was our class's quota for the day."