The correct answer is C. Safari.
A search engine is a software application that helps users find information on the internet. It does this by crawling the web and indexing websites. When a user searches for something, the search engine returns a list of websites that match the search terms.
Yahoo, Bing, and Ask are all search engines. They work by crawling the web and indexing websites. When a user searches for something, they return a list of websites that match the search terms.
Safari is a web browser. It is a program that allows users to view websites on the internet. It does not crawl the web or index websites. When a user searches for something, it sends the search terms to a search engine, such as Google or Bing, and returns the results from that search engine.