What is the core concept of object-oriented programming (OOP)?

The core concept of object-oriented programming (OOP) centers around the idea of "objects," which encapsulate both data and methods that operate on that data. This paradigm allows developers to create structures that represent real-world entities, making it easier to model complex systems in the code. Each object can be seen as an instance of a class, which defines the properties (data) and behaviors (methods) that these objects can have.

In contrast to procedural programming, which focuses on a sequence of tasks to perform actions, OOP promotes a design approach that is more modular and organized. This enables code reuse through inheritance, where new classes can inherit properties and behaviors from existing ones, and polymorphism, which allows for methods to do different things based on the object that is invoking them.

Considering the other options, they do not capture the essence of OOP. The first option emphasizes user input, which is more about user interaction with the software rather than the structural design imposed by OOP. The third option refers to a particular way of organizing applications in terms of network architecture, which doesn’t pertain to the fundamental principles of OOP. Lastly, the fourth option suggests applying structured programming techniques, which is a different methodology focused on defining clear control flow,