Final answer:
Tracy can use the Wayback Machine to review snapshots of a website from multiple points in time, providing a historical archive of web pages.
Step-by-step explanation:
Tracy can review snapshots of a website from multiple points in time using the Wayback Machine. The Wayback Machine is part of the Internet Archive, a nonprofit organization that archives digital information, including archived versions of web pages across the internet. This tool allows users to see what websites looked like at various points in the past by entering the URL into the Wayback Machine search bar and browsing through the available snapshots.