Which aspect of the UI architecture includes the workspace where users interact with application features?

The Screen Area is vital to the UI architecture as it serves as the primary workspace where users engage with the various features of the application. This area is designed to display forms, data grids, and other interactive components that users manipulate to perform their tasks. It is where the main content is rendered, allowing users to view and interact with the application’s functionalities effectively.

In contrast, the Sidebar typically contains navigation elements or tools, while the Tab Bar may help users switch between different sections or views of the application. The Info Bar is generally used for displaying context-sensitive information or notifications related to the user's current actions. While all these components enhance user experience, they do not constitute the main area where the actual interactions with application features occur—this is primarily achieved within the Screen Area.