How does Ann Rinaldi use imagery in Wolf by the Ears?

Imagery:

"It was made of cast iron, and she would take it to the song and preaching meeting later this afternoon. On some plantations, such meetings are forbidden, and such pots are used to capture the sounds of the meeting so white patrollers won't hear them."

"My body felt bruised. My mind felt betrayed. My skin felt like it wanted to come off."