Challenge 2: Recovering an Accidentally Deleted Table — Solution Walkthrough

How Version History would recover it:

Open File > Version History > See Version History, browse backward
through the automatic checkpoints to find one from just before the
table was deleted (checking the highlighted per-editor colour changes
can help identify roughly when the deletion happened), and either
copy the table's content directly from that older version to paste
back into the current document, or — if nothing else important has
changed since — restore that entire version outright.

Why a Ctrl+Z from a different browser session wouldn't necessarily work:

Ctrl+Z's undo history is typically local to the specific browser
session/tab that made the change — it's a buffer of recent actions
held in that one session's own memory, not a server-side record. If
the deletion happened in one person's browser tab and a DIFFERENT
person (or the same person in a different tab or after closing and
reopening the document) tries Ctrl+Z, there's no shared undo history
to reach into — that session never performed the deletion itself, so
it has nothing of its own to "undo." Version History works regardless
of which session or device is used to access it, precisely because
it's a continuous, server-side record rather than a per-session local
buffer.

WHY THIS WORKS AS AN ANSWER
------------------------------
This is a direct, concrete instance of this chapter's own core
distinction: Version History's real advantage over a local undo isn't
just "it goes back further" — it's that it's accessible from ANY
session, which a local Ctrl+Z buffer fundamentally cannot be.