What is a Git Branch?

A Git branch is indeed defined as an independent line of development. This concept allows developers to diverge from the main line of development, often referred to as the "main" or "master" branch, to work on features, fixes, or experiments in isolation. Each branch maintains its own set of changes and allows for multiple development efforts to happen simultaneously without affecting the main codebase until the changes are merged back.

When using branches, developers can freely make changes, test new functionalities, and ensure work is stable before integrating it into the main project. This independence is fundamental to collaborative workflows, reducing conflicts and improving the overall organization of code within the repository.

The other choices, while they refer to different aspects of Git or version control, do not accurately represent what a Git branch is. For instance, stating that a Git branch is a copy of the entire repository incorrectly suggests that branches duplicate everything in the repository, which is not the case. Branches are lightweight pointers to specific commits, rather than full copies of the repository. Additionally, describing a branch as a command to delete files or as a version of the project without history does not capture the essence of how branching works within the Git framework.