Because gui programs must respond to the actions of the user, they are said to be

GUI programs are event-driven.

Explanation:

The graphical user interface (GUI) programs are characterized by their visually interactive system and by being an event-driven program, which allows the user to define the processes they want in their system, the GUI is used in the software of the computers to facilitate and be more attractive to use the computer for people.

Icons and buttons integrate the GUI programs; the user can modify the appearance of the sound, the size to their liking, this program is known for the ease of use offered by the directed programming of the events provided to its users.

For example, among the GUI programs is Microsoft windows, in which there is a set of software for computers and cell phones, which are characterized by event-driven.

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