The Heavy Formation brings the Backside Tackle over to the formation side, and puts the Backside Receiver where the Backside Tackle was.
Zone Option is utilized when the defense forces a give to the B-Back on Triple.
When this happens, the offense makes the defense defend the Quarterback and the Backside A-Back.
Utilize Heavy Zone Option when the defense forces the B-Back give on Triple. Make the defense play the Quarterback when they don’t want to do so.