What is the distinction between "open source" and "proprietary software"?

The distinction between "open source" and "proprietary software" is best captured by the information that open source software is freely available, while proprietary software is owned and has restricted access. Open source software allows anyone to view, modify, and distribute the source code, encouraging collaboration and community-driven development. This means users can adapt the software to fit their needs and contribute back to the community.

In contrast, proprietary software is developed by an individual or company that retains exclusive control over it. Users who want to use proprietary software must pay for a license, and they typically cannot access the source code, nor can they modify it. This ownership model often leads to restrictions on how the software can be used and shared.

The other choices presented do not accurately represent the core distinction between the two types of software. For example, the notion that proprietary software is inherently more secure does not hold true as security can vary widely based on how any software is developed and maintained. Also, the claim that open source software cannot be modified is incorrect since modification is a fundamental characteristic of open source. Lastly, stating that both types of software are free to use overlooks the financial costs typically associated with proprietary software.