Which type of diagram is utilized to visually represent user interactions with an information system?

The use case diagram is specifically designed to visually represent user interactions with an information system. It focuses on the various ways users, referred to as "actors," engage with the system to achieve specific goals or tasks. Each use case in the diagram illustrates a particular function of the system from the user's perspective, allowing stakeholders to understand the functional requirements of the system.

Use case diagrams are beneficial because they simplify complex system requirements and emphasize user interactions, making them easily understandable for both technical and non-technical audiences. They help in identifying the functionality that needs to be implemented based on user needs and expectations.

In contrast, flowcharts depict the sequence of operations or processes within the system, but do not emphasize user interaction. Entity-relationship diagrams illustrate the relationships between data entities within a database, primarily focusing on data structure rather than user interaction. Class diagrams, on the other hand, are primarily used in object-oriented design to show the relationships between classes but do not specifically address user interactions with the system.