Gitflow is a branching model that provides a predefined structure for managing feature development, releases, and hotfixes. It introduces branches like 'feature,' 'release,' and 'hotfix,' which serve specific purposes. On the other hand, feature branching is a simpler approach where each new feature gets its own branch. The key difference lies in the predefined structure that Gitflow offers, making it more suitable for complex projects.

The correct option is c. Resolve. When conflicts occur during a rebase operation, Git pauses and asks you to resolve the conflicts manually. After resolving conflicts, you need to continue the rebase process.

The 'git blame' command is used to identify the commit that last modified each line of a file. It helps in understanding the history of changes and who made those changes.

The git log command is used to display the commit history of a repository. It shows information such as commit messages, authorship, and timestamps. This is useful for tracking changes and understanding the development timeline of a project.

The correct option is b. Combine. When you use git rebase -i, you can interactively choose what to do with each commit, including combining or modifying them. This is useful for cleaning up commit history in a complex project.

In Git, the .gitignore file is used to specify intentionally untracked files that Git should ignore. This helps in maintaining a clean working directory and prevents unnecessary files from being committed.

The 'git log' command provides a detailed history of commits, including branching and merging. It helps visualize the chronological order of commits in the repository.

In Git, a 'Fork' is primarily used for cloning a repository from one remote to another. Forking is commonly associated with collaborative development on platforms like GitHub, where a user can fork a repository to create their copy. This copy is independent and can be modified without affecting the original repository. Forking is a fundamental concept in open-source collaboration and contributes to the decentralized nature of Git.

In complex merge scenarios, a three-way merge helps by considering the common ancestor, the source branch changes, and the target branch changes. This approach minimizes conflicts and provides a more intelligent way of resolving merge issues.

Git LFS (Large File Storage) is a Git extension designed to handle large files efficiently. It replaces large files with text pointers in the Git repository while storing the actual files on a remote server.