Final answer:
In the book 'Resistance,' Sara was sent to the Treblinka extermination camp, one of the Nazi death camps used for the mass murder of Jews during the Holocaust.
Step-by-step explanation:
In the book Resistance, Sara was sent to the Treblinka extermination camp. This camp was one of several Nazi death camps established for the systematic murder of Jews during the Holocaust. Treblinka specifically operated from early 1942 until late 1943, and it, along with Belzec and Sobibor, were primarily used to murder the Jews of Poland.
The camps were not meant for long-term incarceration or labor; arriving prisoners deemed unsuitable for work were often sent directly to gas chambers, disguised as showers, for immediate extermination. Consequently, around 7,000 members of the resistance captured were sent directly to Treblinka's gas chambers, and over 42,000 others were sent to Majdanek and other forced-labor camps.