Which elements are characteristic of a class diagram?

A class diagram is a fundamental part of the Unified Modeling Language (UML) used primarily in object-oriented design. It provides a visual representation of the classes within a system, including their attributes (data) and methods (functions). The correct choice encompasses essential components of class diagrams, which include not only the classes themselves but also their relationships, constraints, and any additional features that define how classes interact with each other.

The primary purpose of a class diagram is to illustrate the static structure of a system by showcasing how different classes relate to one another. By defining the classes, their attributes, and methods, the diagram communicates crucial information about the system's design, enabling developers to understand how to implement functionalities within those classes as well as how they are interconnected.

Other choices do touch upon aspects of system design but do not accurately reflect the intent or focus of a class diagram. For instance, ones that mention the flow of logic or process interaction pertain more to activity diagrams or sequence diagrams, which illustrate dynamic behavior rather than the static structure of a system. Similarly, references to physical resources or logical architecture relate more to deployment or architecture diagrams rather than direct representations of the relationships and functionalities of specific classes. Lastly, while internal structures and collaborations are relevant, they are