Final answer:
Tuvia Bielski, Helmuth Hubener, and Oskar Schindler were heroes of the Holocaust because they played significant roles in saving Jewish lives and protecting them from Nazi persecution.
Step-by-step explanation:
Tuvia Bielski, Helmuth Hubener, and Oskar Schindler were heroes of the Holocaust because they helped save the lives of Jews during the Holocaust. Oskar Schindler, in particular, is well-known for protecting thousands of Polish Jews in his factories, ensuring they were treated humanely and kept safe from Nazi atrocities. This kind of courageous action in the face of widespread persecution and moral indifference is what earned them their status as righteous individuals amidst the darkness of the Holocaust era.