Here's why:
* The setting of the Holocaust: The book chronicles the horrors of the Holocaust, where death was a constant and terrifying reality. The camps were designed to dehumanize and kill, creating an environment where death felt ubiquitous.
* The presence of crematoria: The crematoria, where bodies were systematically burned, serve as a powerful symbol of death and the systematic extermination of Jews.
* The loss of faith: Eliezer, the protagonist, struggles with his faith as he witnesses the horrors inflicted upon him and his fellow prisoners. The loss of faith can be seen as a symbolic death of innocence and hope.
* The dehumanization: The Nazi regime stripped away the humanity of the prisoners, reducing them to mere numbers and objects to be manipulated and ultimately destroyed. This dehumanization can be seen as a symbolic death of the spirit.
In essence, the entire atmosphere of the book, the actions of the Nazis, and the constant threat of death can be seen as representing the "Angel of Death" – a force of destruction and despair that pervades every aspect of the prisoners' existence.
It's important to note that the concept of the "Angel of Death" is not a literal character in the book. It's a symbolic representation of the overarching theme of death and its pervasive influence on the lives of the prisoners.