How does Yoshiko Uchida use imagery in Journey to Topaz?

The imagery surrounds Yuki's young life. After her comfortable years growing up in Berkeley, Yuki finds the Tanforan Race Track—renamed the Tanforan Assembly Center—a shock. One of fifteen such assembly centers hastily set up to house the 110,000 Japanese-Americans of the West Coast, Tanforan is bleak and crowded. Yuki is momentarily impressed when she hears that her family has been assigned "Barrack 16, Apartment 40," but the apartment turns out to be a hastily converted horse stall.