I know this is rudimentary, but it's been killing me lately.<br/><br/><b><i>The sound which I heard was much louder.</i></b><br/><br/>"Which" is the <u>direct object</u> in the restrictive relative clause, right?<br/><br/>If I omit the "which," is it still a restrictive relative clause?<br/><br/>Thanks, - A.