Knowledge Check

1. Saving vs. Committing: Saving = disk; Committing = history.
2. Red line: Deletion.
3. Restore: Discard Changes button.
4. .gitignore: Prevents tracking junk/secrets.
5. Branch: Parallel experimental workspace.
6. PR: A peer review workflow for merging code.
7. Relative Paths: Ensures the project runs on any machine.