1. Nazi Leaders: The Nazi leaders were responsible for planning, organizing and carrying out the Holocaust. This included Adolf Hitler, Heinrich Himmler, Reinhard Heydrich, Joseph Goebbels and many others who were part of the Nazi regime.
2. German Citizens: German citizens were a key part of the Holocaust, as they enabled and supported the Nazi regime in various ways. They were often complicit in the persecution of Jews and other minorities, and were involved in the deportations and killings. They were also responsible for helping to create the social and political conditions that allowed for the Holocaust to take place.Answer: