The tool developers use to manage and control version changes in their code is called version control software, with Git being the most popular example. Version control systems track changes in code, allowing multiple developers to collaborate efficiently while maintaining an organized history of project modifications. This facilitates features like branching and merging, enabling developers to work on new features or bug fixes independently before integrating them into the main codebase. As a result, version control enhances collaboration, reduces errors, and simplifies the process of reverting to previous code versions if needed.