What type of data is characterized by its ability to be freely accessed and modified?

The type of data that is characterized by its ability to be freely accessed and modified is open-source data. Open-source data adheres to principles of accessibility and transparency, allowing users to not only access the data without restrictions but also to make modifications and improvements as needed. This open nature fosters collaboration and innovation, as individuals and organizations can build upon the work of others, share enhancements, and apply the data to various applications without legal or financial barriers.

In contrast, closed-source data and proprietary data come with restrictions that limit access and modifications. Closed-source data is typically owned by an individual or organization who keeps the data private, while proprietary data is also owned but may be available under certain licenses that restrict its use and alterations. Crowdsourced data, although it may seem freely available, is often collected through public contributions and might not necessarily allow for modification or redistribution at the same level as open-source data. Therefore, open-source data is distinct in its commitment to free access and modification.