How is responsibility divided between system components?

In Flutter, the separation of responsibilities between system components is usually implemented through architectural patterns such as BLoC, Provider, or MVVM.

• UI components (widgets) are responsible only for display and user interaction.
• Application logic and state management are delegated to separate classes or blocks (e.g., BLoC), which handle events and update the state.
• The data layer is responsible for retrieving and storing information (e.g., through repositories).

This separation helps make the code more maintainable and testable, as well as facilitates application scaling.