Which diagrams help represent the structural perspective of a requirements model?

Diagrams that represent the structural perspective of a requirements model are essential for visualizing and understanding the system's components and their relationships. Entity-relationship diagrams and class diagrams both serve this purpose effectively.

An entity-relationship diagram is a visual representation that illustrates how various entities (objects or concepts) within a system relate to one another. It shows attributes of entities and the relationships (such as one-to-many or many-to-many) between them, making it an excellent tool for modeling data requirements and the structure of a database system.

A class diagram, rooted in object-oriented modeling, depicts the classes within a system as well as the relationships and hierarchies among them. It includes details such as attributes and methods, which are crucial for understanding the structure of the software system and how different components interact with one another.

Since both diagrams focus on the structure—either in terms of data relationships or object-oriented classes and their interactions—the correct answer is indeed that both the entity-relationship diagram and class diagram effectively represent the structural perspective of a requirements model.