What command would you use to merge a branch in Git?

The command used to merge a branch in Git is "git merge [branch-name]." This command allows you to integrate changes from the specified branch into your current branch. When you perform this operation, Git takes the contents of the specified branch and merges it into your current HEAD branch, creating a new commit that combines both sets of changes.

Using "git merge" is a fundamental part of collaborative workflows in Git, as it facilitates code integration and helps manage parallel development efforts from multiple branches. This command is widely used when you want to combine features developed on a separate branch back into the main branch, such as 'main' or 'master,' after those features have been thoroughly tested and are ready for deployment.

In contrast, the other options listed do not correspond to any valid Git commands. There is no "git join" or "git integrate" command in Git, and "git combine" is similarly nonexistent. Understanding the correct usage of "git merge" is crucial for efficient version control and collaboration within Git repositories.