Free software that comes with the source code that users may modify and redistributeGroup of answer choicesFreewareSharewareEducationalOpen source

The correct answer to the question is Open source.

Explanation:

1. Open Source: This type of software comes with its source code, allowing users to modify, enhance, and redistribute it. This reflects the core philosophy of open-source software, promoting collaboration and sharing.

2. Freeware: This refers to software that is available for use at no cost but typically does not provide access to the source code. Users cannot modify or redistribute freeware.

3. Shareware: This software is distributed for free on a trial basis, often with limited features, requiring payment for the full version. It does not usually come with source code.

4. Educational: This option generally refers to software designed for teaching or academic purposes. While some educational software may be free, it does not inherently denote the availability of source code or modification rights.

In conclusion, "Open source" is the correct category, as it signifies software that is not only free to use but also allows for modification and redistribution of the source code.