Jessica has pinned her favorite applications as icons on her desktop. She always clicks on these icons to work on them. Which user interface is she using here?

Graphical User Interface (GUI)

Explanation:

Graphical User Interface clicking on various icons to perform a certain functionality. GUI is a form of user interface that allows users to interact with electronic devices through graphical icons and audio indicator such as primary notation, instead of text-based user interfaces or command line interface where you would have to type to run the program rather than just click it.