Your answer is <span>B) Now, Jonathan realized that hard work comes in all sorts of shapes and sizes. </span>
The correct option is INDEXING.
A crawler based search engine refers to a software that maintain searchable databases of web pages and which organised those pages for users in a valuable manner. An example of crawler based search engine is Google. The search words or phrases that a user input into a craw based search engine is used to retrieve relevant information from the software databases based on the in-built index structure.