How does Dana Reinhardt use imagery in The Things a Brother Knows?

Imagery:

"'Is something broken?' Bo puts his face in his hands and lets out a sound that's one part laughter, one part sigh of resignation. 'I'm afraid it's my motherboard.'" (Chapter 14, page 171)

"I've gone a month without a shower. And even when there were showers to be had, you got in and got out 'cause some other guy was waiting. . . So taking a long, hot shower in a place where it feels safe to do so is maybe the best part of being back." (Chapter 17, page 203)

"The whole thing blows apart. One minute everything is quiet, everything is fine. . . and the next minute your friend is lying three feet away from his legs." (Chapter 18, page 210)