Final answer:
According to Elie Wiesel, the first acts of the prisoners upon liberation were seeking food and water. These basic needs were prioritized due to the severe deprivation suffered in the camps.
Step-by-step explanation:
According to Elie Wiesel, a Holocaust survivor and the author of 'Night,' the first acts of the prisoners upon leaving the concentration camps were seeking food and water. This basic need for sustenance was paramount after enduring extreme deprivation during their imprisonment. This is supported by the historical accounts which detail that Allied troops provided prisoners with food and medical care immediately upon liberation, recognizing their dire need for immediate assistance.