Choose help for the command you are using

These short summaries explain where to look; they are not complete
manual pages. A builtin belongs to the shell. A pager displays long
text. Use the supplied option meaning if no manual is installed.

help cd: Bash supplies builtin help for directory changes.
man ls: installed manual opens if present; pager/navigation may vary.
In a less-style pager: /all then Enter searches; n repeats; q exits.
ls --help: external program's own option summary, normally no pager.
Expected reasoning: ls -a includes entries beginning with a dot.
Fallback summary: cd changes the shell working directory; ls lists
directory entries; -a includes dot entries; grep searches file content.
Question task: choose Bash builtin help for cd: help cd or man grep.
Shell module case: shell-case/originals/source.txt = copper newline.
work/.keep = original empty-work placeholder (newline).
List archive first; copy source into work/copy.txt; replace only copy
with silver; inspect both; locate the hidden-file listing option.
Expected: original copper; copy silver; identify -a from help.