Explanation:
Box 1: Exchange Online Protection (EOP)
Ransomware protection in Microsoft 365
Teams
Teams chats are stored within Exchange Online user mailboxes and files are stored in either SharePoint or OneDrive. Microsoft Teams data is protected by the controls and recovery mechanisms available in these services.
Box 2: The Preservation Hold library
Preservation Hold library: Files stored in SharePoint or OneDrive sites can be retained by applying retention settings. When a document with versions is subject to retention settings, versions get copied to the Preservation Hold library and exist as a separate item. If a user suspects their files have been compromised, they can investigate file changes by reviewing the retained copy. File Restore can then be used to recover files within the last 30 days.
Reference:
https://learn.microsoft.com/en-us/compliance/assurance/assurance-shared-ransomware- protection