How does Alicia Partnoy use imagery in The Little School: Tales of Disappearance & Survival in Argentina?

Imagery:

"She thought he was upset because in spite of the blows and restraints, in spite of the filth and torture, both women had had that long and warm conversation under the rain."

"A new cry makes its way through the shadows fighting above the trailer. Graciela has just given birth. A prisoner child has been born. While the killers' hands welcome him into the world, the shadow of life leaves the scene, half a winner, half a loser: on her shoulders she wears a poncho of injustice. Who knows how many children are born every day at the Little School?"