Which approach utilizes UML diagrams to model systems?

The choice of object-oriented analysis is correct because this approach specifically leverages UML (Unified Modeling Language) diagrams to model systems. UML is a standardized modeling language that provides a set of graphical notation techniques to create visual models of software systems. In object-oriented analysis, UML diagrams such as class diagrams, use case diagrams, and sequence diagrams are utilized to represent the system's components, their relationships, and interactions.

This approach focuses on identifying objects, their attributes, behaviors, and the relationships they have with one another, which is essential in understanding the functional requirements of a system. By using UML, developers can better visualize and communicate the structure and behavior of the system they are modeling, which ultimately helps in creating more cohesive and scalable software solutions.

The other approaches may incorporate different modeling techniques or methodologies that do not prominently feature UML diagrams. For example, structured analysis often relies on data flow diagrams and other traditional methods that may not utilize UML. Requirements verification focuses on ensuring that the gathered requirements are well-defined, accurate, and feasible but does not inherently involve modeling with UML. Lastly, software design principles encompass broader conceptual guidelines for good design in software engineering but do not specifically involve the use of UML diagrams as a primary tool.