What is the main function of Git in software development?

The main function of Git in software development is to track changes in source code. Git is a version control system that allows developers to keep a history of modifications made to the codebase, making it easier to collaborate with others, revert to previous versions, manage changes, and maintain a clear historical record of development. With Git, developers can create branches to experiment with features without affecting the main code, and they can also merge those branches back into the main project when changes are finalized. This capability is essential in teamwork, as it provides tools for merging, conflict resolution, and collaborative reviews.

The other options do not accurately describe Git's primary functionality. While managing application interfaces, encrypting data, and documenting comments are important aspects of different areas of software development, they are not functions associated specifically with Git.