Which part of the User Interface architecture allows access to specific insurance data?

The info bar is a crucial element of the User Interface architecture in Guidewire, specifically designed to facilitate access to certain details related to insurance data. This component is typically utilized to display contextual information pertinent to the user's current task or selection within the application. By showing relevant insurance data, it helps users quickly gather the information necessary for making informed decisions or updates.

The other components, while important for navigation and organization within the application, serve different purposes. The sidebar often provides links to different sections or functions of the application, ensuring users can easily navigate among various features. The tab bar usually organizes content into sections for easier access, allowing users to switch between different views or tasks efficiently. The workspace, on the other hand, serves as the main area where users interact with the application and perform their tasks, but it doesn’t specifically focus on providing access to particular insurance data.

Therefore, the info bar stands out as the component that is specifically designed for showcasing and facilitating access to pertinent insurance information, making it the correct answer.