To challenge the reader effectively in a closing statement for the explanatory text, the author might consider suggesting that people in today’s world can learn the effects of drought by continuing to study how ancient people dealt with it. This approach not only connects the present to the past but also emphasizes the ongoing relevance of historical experiences in understanding current and future climate challenges. For example, the author could conclude with a statement like:
"As we face increasingly unpredictable climate patterns, let us heed the lessons carved into the walls of Dayu Cave—ancient reminders that the struggles endured by our ancestors in the face of drought can inform our strategies and resilience today. Just as their graffiti chronicled their hardships and hopes, so too must we document our current environmental challenges, ensuring that we learn from history and adapt for a sustainable future."
This closing not only challenges the reader to reflect on the significance of the past but also encourages proactive engagement with contemporary issues.