Answer:
a. Some prizes aren't worth it.
Explanation:
A moral is a lesson that the writer wants to relay or teach the readers. It is often the important lesson that tells us what is right or wrong and how to behave.
In the given short story, the two flies acted without any thinking, in their own interest. They even teased the older fly who had stayed back. And then, as it turns out, the two flies got stuck in the honey, even though they managed to eat the honey.
This story teaches us that some things are not worth the pain. Like the stuck flies will regret eating the honey without second thoughts, the story teaches us the lesson that some prizes are not worth it.