Final answer:
To expand a sentence, additional details, a concluding statement, or a rhetorical question can be used to provide more context, summarize the ideas, or engage the reader's thought process.
Step-by-step explanation:
To expand the sentence mentioned in the question, one could add additional details, a concluding statement, or a rhetorical question. By including additional details, the writer would provide more information and context to the reader, making the narrative more engaging. A concluding statement could sum up the ideas or provide a final thought on the topic, while a rhetorical question could provoke thought and engage the reader's curiosity or emotions, leading them to ponder further on the subject of the sentence.