Why is modularity important in programming?

Modularity is a crucial aspect of programming because it enables developers to break down complex software into manageable, discrete components or modules. This approach not only enhances maintainability and readability of the code but also facilitates collaboration among developers. When code is modular, it can be organized into various source files, allowing different parts of the application to be developed, tested, and modified independently. This significantly streamlines the process of managing large codebases, making it easier to identify and address bugs or to update specific functionalities without affecting the entire system.

Moreover, organizing code into separate files helps in promoting reusability. Developers can create modules that can be reused across different projects, saving time and effort in future software development tasks. This separation of concerns leads to better-structured code and a more efficient workflow.

Other options do not align with the essence of modularity. The reduction of memory size, the elimination of functions, and the combination of all programs into a single file do not encapsulate the core benefits of a modular programming approach. In fact, combining everything into one file typically leads to complications and hinders code maintenance.