1 and 2 are correct.yes both prepositions are ok.
<h2><u>Definition </u></h2><h2>lllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllll</h2>
Eye contact, clear words, pronunciation..
<span>the part of a sentence containing the verb and any direct or indirect object, but not the subject.</span>
