Answer: Nappi substitutes words for stones.
Step-by-step explanation:
Using process of elimination, we can immediately rule out the 2nd and 4th option. It doesn't include any mention of gods and goddesses, and basically the whole story is about a supernatural event. Option 3 isn't right either, because there aren't any animals. Therefore, the answer is option a, Nappi substitutes words for stones.
P.S. I hope I got it right, but tell me if I didn't and I'll try to fix it!