By definition, imagery is a literary technique where a writer uses words that will enable a reader to form an image or picture in their mind about what the writer is talking about.
The writer has used a lot of imagery in the book, as follows:
1. Remi kneeling while mourning the death of his wife, Thoni who is on a stretcher. Here, you are able to create an image of Thoni being carried on a stretcher; and Remi kneeling beside the dead body of Thoni, crying.
2. Thoni telling the woman she longs for the darkness and tells her of a time she was lost in darkness (lost consciousness). In the book, darkness symbolizes death. Thoni says in the darkness you can't see anyone because it's very thick. In the darkness, there is peace and no one to hurt you. In this instance, you can picture how total darkness is. You can't see anybody. You will create a relationship between darkness and death, and be able to form an image of what death is like. When you're dead, there is nobody to hurt you because you're not alive or breathing. People can't hurt a dead body.
3. The meeting of the elders. You can picture the elders responding together when their leader utters several statements.