nina is leaning about clouds in he science class so she puts the phase "types of clouds" in a search engine. in which step of a crawler-based search engine is this phrase most important?

a. indexing
b. crawling
c. ranking
d. retrieving

b. crawling

In the crawling phase of a crawler-based search engine, the search engine's software known as a crawler or spider scans and indexes web pages based on keywords and phrases. By putting the phrase "types of clouds" in the search engine, Nina is providing the crawler with specific criteria to search for and index relevant web pages containing information about different types of clouds.