Under the object-oriented paradigm, the issue of software reusability is addressed mainly by which of...

In object-oriented software development, reusability is mainly achieved through classes. A class defines a reusable abstraction that combines data attributes and behavior methods into a single structure. Once a class is designed, tested, and verified, it can be reused directly or extended through inheritance and polymorphism. Attributes alone represent data, methods alone represent behavior, and messages represent communication between objects. These are important object-oriented elements, but they do not provide the main reusable unit. The class is the primary construct because it packages state and behavior together, supports encapsulation, and allows developers to build new software by reusing existing tested components. This improves consistency, productivity, and maintainability.

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