The moral could be about the importance of hard work and preparation. The ducks that build better shelters are more likely to be safe, showing that being responsible and taking time to do things right pays off.
The Three Little Ducks story is often about three little ducks going on an adventure. They might swim in a pond, look for food, and play together. Maybe they meet other animals along the way like frogs or fish.
The three little ducks are the main characters. They each have their own personalities, which might be shown through how they build their shelters. One could be more careful, another more hasty, and the third one might be in - between. Their actions and decisions drive the story forward.
Hostel isn't based on any true events. It's a product of the filmmaker's imagination and designed to entertain with its horror elements and plot twists.