Answer: I known the answer for this question, the answer is from this link
Explanation:https://www.toppr.com/guides/essays/world-environment-day-essay/
I`ve read this book like 9 times, so i`ll take a gander and say it`s C. Smaug had promised it to him if he led him to the dwarves.
Answer:
It reminds them about the lost souls
