What is the main idea of the following paragraph? A spider, also known as a robot or a crawler, is actually just a program that follows, or "crawls," links throughout the Internet, grabbing content from sites and adding it to a database. Spiders only can follow links from one page to another and from one site to another. That is the primary reason why links to your site (inbound links) are so important. Links to your Web site from other Web sites will give the search-engine spiders more information. The more times they find links to your site, the more times they will stop by and visit. Search engines rely on spiders to create their vast knowledge of Web sites.

A spider crawls throughout the Internet.
A spider crawls throughout the Internet.

A crawler is the same thing as a robot.
A crawler is the same thing as a robot.

Links of your Web site going to other Web sites are important.
Links of your Web site going to other Web sites are important.

A spider is software that follows links from site to site, acquiring content and information.
A spider is software that follows links from site to site, acquiring content and information.

Which action describes an aspect of technological design?

Eva has many contacts on the professional networking site she uses which contacts are considered second degree

Read this excerpt from helen keller’s autobiography, the story of my life. have you ever been at sea in a dense fog, when it seemed as if a tangible white darkness shut you in, and the great ship, tense and anxious, groped her way toward the shore with plummet and sounding-line, and you waited with beating heart for something to happen? i was like that ship before my education began, only i was without compass or sounding-line, and had no way of knowing how near the harbour was. "light! give me light! " was the wordless cry of my soul, and the light of love shone on me in that very hour. . the morning after my teacher came she led me into her room and gave me a doll. the little blind children at the perkins institution had sent it and laura bridgman had dressed it; but i did not know this until afterward. when i had played with it a little while, miss sullivan slowly spelled into my hand the word "d-o-l-l." i was at once interested in this finger play and tried to imitate it. when i finally succeeded in making the letters correctly i was flushed with childish pleasure and pride. running downstairs to my mother i held up my hand and made the letters for doll. i did not know that i was spelling a word or even that words existed; i was simply making my fingers go in monkey-like imitation. in the days that followed i learned to spell in this uncomprehending way a great many words, among them pin, hat, cup and a few verbs like sit, stand and walk. based on this excerpt, which words best describe helen keller?