<u><em>The proper answer to this question is "adjective".</em></u>
Reason:
<u><em>The word ran is the adjective which tells the user that Jack, and Jill ran up the hill.</em></u>
Also...
<u><em>A adjective is a word that gives information on what the subjects are doing for example ran is giving the reader information that Jake, and Jill ran up the hill.</em></u>
<em>Therefore the answer is the first option.</em>