What does the jQuery() function do?
<p>In continuation to the question
<a href="http://stackoverflow.com/questions/1452380/good-jquery-interview-questions-closed">http://stackoverflow.com/questions/1452380/good-jquery-interview-questions-closed</a></p>

<p>I have a follow up question.
What does the jQuery() function do? (there are four answer to this; subject should at least describe the selector-and-element-set mode)</p>

<p>I tried with googling but could not get a clear answer.</p>

<p>Thanks for any help in advance.</p>
