How does Lynne Rae Perkins use imagery in Criss Cross?

Examples of Imagery:

"Life was rearranging itself; bulging in places, fraying in spots. Sometimes leaving holes big enough to see through, or even step through, to somewhere else."

"It's just fun to be a healthy beautiful young person walking around on a sunny afternoon with another healthy beautiful young person. A lot of fun. They shared their golden selves with the world, and the world smiled back."