Final answer:
The Nazis contained and killed prisoners during the Holocaust in concentration camps.
Step-by-step explanation:
The Nazis contained and killed prisoners during the Holocaust in their concentration camps. These camps were established throughout Nazi-occupied territory and were used to imprison, torture, and exterminate millions of people, including Jews, Romani people, LGBTQ+ individuals, disabled individuals, and political dissidents.
Learn more about concentration camps during the Holocaust