Answer:
It is the SQL of WWW. Or in other words, it is the web tool that helps the users in locating the required information on the WWW. Various top search engines are like Google, MSN, and Yahoo. And the information that is gathered by the spider is used for creating the searchable index for the content on the web. This spider crawls according to the search engine algorithm and that is known as web crawling.
Explanation:
Please check the answer section.
I believe the answer is D, document object model. Conditional Statements deal with if statements, iterative structures are while and for loops, HTML tags are the tags which help to format and define a webpage, and src attribute deal with specifying external sources for certain tags.
