Final answer:
The sun rising marked the beginning of a new day after Elie's first night at Auschwitz. This symbolizes not only a literal new day but also a metaphorical shift in the character's identity and perception due to the traumatic experiences.
Step-by-step explanation:
The natural sign that marked the beginning of the next day after Elie's first night at Auschwitz was the first yellow beam of the sun, as described in the provided text. This sunbeam not only signaled a new day but also a transformation within the characters, symbolizing a shift in their realities and selves. When Elie talks about the change in himself, he may be referencing a profound alteration in his identity, outlook on life, or loss of innocence due to the traumatic experiences faced in the concentration camp. Such changes are often seen in literature where characters are subjected to extreme circumstances that force them to confront harsh truths and evolve in unexpected ways.
In the provided text, the transformation of the characters under duress is captured in powerful imagery, such as the looming fear, mist rising, or the radiant stars seen in a different light, signifying a profound internal change in perception or emotional state.