Final answer:
The question about Abraham and Sarah's age at the time of Isaac's promise pertains to the Social Studies subject and is typically covered in Middle School. It relates to a biblical story in the Old Testament and the accompanying text provides emotional context.
Step-by-step explanation:
The question refers to a biblical narrative, specifically to the story of Abraham and Sarah and the promise of Isaac's birth. Abraham was indeed 100 years old, and Sarah was 90 years old when they were promised a child according to the Old Testament. This type of question falls under the category of Social Studies, as it deals with religious texts which are often studied in this subject.
The provided text seems like part of a story or script that evokes the setting of this biblical event, portraying an emotional moment between Sarah and Abraham. It could enhance a student's understanding of the historical context and the emotions of the characters involved in these biblical stories, but it is not directly related to the ages of Abraham and Sarah at the time of Isaac's promise. The scene depicted in the text sets a peaceful yet emotionally heavy atmosphere, potentially reflective of Abraham and Sarah's long wait for a child.