Final answer:
Mordechai Anielewicz was the leader of the Jewish Combat Organization (ZOB) during the Warsaw Ghetto Uprising against the Nazis in World War II.
Step-by-step explanation:
In the book Resistance, the leader of the Jewish Combat Organization (ZOB) was Mordechai Anielewicz. The ZOB was an underground resistance group formed to defend against the Nazis in the Warsaw Ghetto during World War II. Mordechai Anielewicz led the group during the Warsaw Ghetto Uprising, which was a significant act of Jewish resistance against the Nazi efforts to transport the ghetto population to concentration camps. The resistance effort lasted from April to May 1943, with the organized resistance ending after the capture of Anielewicz on May 8th. Small groups continued to fight until mid-May, showcasing the heroic turmoil and struggle for freedom and survival against overwhelming odds.