Final answer:
The passage from Elie Wiesel's 'Night' exudes an atmosphere of terror and despair, highlighted by the phrases that describe trembling and the abyss opening beneath, which support the conclusion about the atmosphere.
Step-by-step explanation:
The atmosphere of the passage from Night by Elie Wiesel can be described as one of terror and despair. The group of words that supports this conclusion about the atmosphere are "We were still trembling, and with every screech of the wheels, we felt the abyss opening beneath us. Unable to still our anguish, we tried to reassure each other." These phrases convey a profound sense of fear and hopelessness.