Final answer:
Rosh Hashanah and Yom Kippur are observed in the camp by the Jewish prisoners. Elie participates in the religious rituals despite the harsh conditions.
Step-by-step explanation:
**Rosh Hashanah** and **Yom Kippur** are important Jewish holidays that are observed in the camp by the Jewish prisoners. Rosh Hashanah is the Jewish New Year and it is celebrated by sounding the shofar (a ram's horn) and reciting special prayers. Yom Kippur is the Day of Atonement and it is a day of fasting and repentance.
Elie, the protagonist in the book Night, observes these holidays by participating in the religious rituals as much as possible, despite the harsh conditions of the camp. In the book, Elie recounts how he and his fellow prisoners gathered in secret to observe Rosh Hashanah and Yom Kippur, finding strength and solace in their faith.