Which of the following is characteristic of open source software?

Open source software is defined by its accessibility, specifically the availability of its source code. This characteristic allows users not only to read the code but also to modify, enhance, and distribute it freely. By making the source code accessible, open source software fosters collaboration among developers and users, leading to improvements and innovations over time. This inclusivity is a fundamental principle of open source development, encouraging community engagement and transparency in software creation.

In contrast, the other options describe characteristics of proprietary or closed-source software. Proprietary software typically requires users to purchase it and often comes with restrictions that prevent modifications to its code or limit use to specific functions, as indicated in the other choices. Understanding open source software's unique philosophy is important for recognizing its benefits, such as user empowerment and collaborative development.