Which of the following is a search engine?

Google crawls and indexes billions of web pages and returns ranked results to a typed query.

Macromedia Flash was multimedia authoring software for animations and interactive content, not a way to find pages.

Netscape Navigator was an early web browser that displayed pages rather than searching for them.

Librarians' Index to the Internet was a curated subject directory of hand-picked sites, not an automated crawler.

A search engine differs from a directory by building its index automatically with software robots.

Google began in 1998 and its PageRank algorithm ranks pages by the links pointing to them.