Answer: Elie Wiesel believes that from tragedy we must learn to remember the victims, refuse to be indifferent, and take responsibility so such horrors are not repeated. Evidence: Wiesel repeatedly urges memory and witness — for example he writes that we must bear witness for both "the dead and the living," and he warns that indifference toward suffering helps oppressors and harms victims. Explanation: I chose the idea of "bearing witness" because it directly says what survivors and readers should do after a tragedy — remember and tell the truth so the story is not forgotten. I chose the idea about indifference because Wiesel connects forgetting or looking away with allowing injustice to continue; that shows why memory must lead to action. Together these pieces of evidence support the answer: Wiesel thinks tragedies demand that people remember, speak up, and act, so history’s worst events will not happen again.