In Pega, which components help enhance user experiences in mash-ups?

The correct choice highlights that gadgets and user interface designs are key components in enhancing user experiences in mash-ups within Pega. Gadgets facilitate the integration of various applications and services into a single user interface, which can improve accessibility and functionality for users. They allow for a flexible display of information and actions from different sources without overwhelming the user.

Furthermore, user interface designs play a crucial role in ensuring that the look and feel of the application are intuitive and user-friendly. A well-designed interface can significantly improve user satisfaction and engagement by making navigation and interaction seamless.

By combining gadgets with effective user interface designs, Pega applications can offer a cohesive and enhanced user experience, making it easier for users to interact with multiple data sources or services simultaneously.