___ are programs that search documents for specified keywords and return a list of the documents where the keywords were found usually on world wide web

### Why this is right A search engine searches an organized index of web pages and other documents for words you enter. It then lists documents that match, which fits the description of finding specified keywords and returning results on the World Wide Web. ### The concept A **search engine** gathers information about web pages, often using automated programs called crawlers, and stores it in an index that can be searched quickly. When you enter a query, it checks the index and ranks matching pages so useful results appear near the top. The results are usually links to documents, not the documents themselves. A **web browser** is the program you use to open and view those pages, while an **electronic resource** is any information source in digital form. | Tool or resource | What it does | |---|---| | Search engine | Finds and lists documents matching a query | | Web browser | Opens and displays websites | | Electronic resource | Provides information in digital form | ### The other options - **A. Web browser**: A browser displays websites you choose to visit. It is tempting because you use it to access the web, but it does not itself search an index of documents. - **C. E-resource**: An electronic resource is digital information, such as an online journal or ebook. It is a type of information source, not a program for finding keyword matches. - **D. None**: This fails because the description matches a search engine. ### Terms - **World Wide Web**: A system of linked pages and other resources accessed over the internet. - **Search engine**: A service that searches an index and lists matching documents. - **Web browser**: Software used to access and display web pages. - **Electronic resource**: Information stored or delivered in digital form, such as an online article. - **Crawler**: An automated program that visits web pages and gathers information for a search engine. - **Index**: An organized store of information that lets a search engine find matches quickly. - **Query**: The words or phrases entered into a search engine. - **Keyword**: A significant word used to search for information. ### Remember A search engine finds and lists pages; a browser opens and displays them.