Which type of information can be obtained from Internet archives?

The correct choice pertains to the ability of Internet archives to retrieve and display content from websites that have been removed. Internet archives, like the Wayback Machine, specifically store snapshots of web pages over time, allowing users to access previous versions of a website even after the current version has changed or the website has been taken down. This functionality is invaluable for researchers, historians, and investigators who need to access information that may no longer be available through traditional web browsing.

In contrast, the other options represent types of content that cannot be retrieved from Internet archives. Password-protected websites are designed to restrict access, and thus their content is not archived unless previously made publicly accessible. Similarly, content not indexed by search engines and content on unlinked websites also fall outside the scope of what Internet archives store, as these types of content are generally not accessible through public web crawling processes that archives rely on.