What does object-oriented design focus on?

Object-oriented design primarily emphasizes structuring software around objects and their interactions. This approach enables developers to model real-world entities through classes and objects, encapsulating data and behavior together. By focusing on objects, developers can create systems that are more intuitive and aligned with how users perceive the problem domain.

In this design paradigm, objects communicate with one another, promoting cohesiveness and reducing dependencies, which enhances modularity and maintainability. This also facilitates code reuse through inheritance and polymorphism, allowing developers to build upon existing code rather than starting from scratch.

The other choices, while they may have elements that relate to software design, do not capture the essence of object-oriented design. For instance, maximizing the number of classes could lead to unnecessary complexity rather than clarity. Minimizing user input is more aligned with user interface design than with the core principles of object-oriented design. Lastly, isolating software from hardware integration pertains to software architecture and can intersect with object-oriented concepts, but it is not a primary focus of object-oriented design itself.