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What is the best way to describe how an Internet search engine works? WILL GIVE BRANYLEST IF RIGHT

A search engine relies on a person who is hired to send you information about the word you typed.

A search engine looks through all the text on the Internet for an direct match to the word you typed.

A search engine figures out the question you have based on the word that you type.

A search engine looks up all the library books ever written about the word you typed.