@88_link If you mean, does leyline protect bridges by preventing your opponents creatures from going to the graveyard and removing your bridge... yes. If your opponents creature dies, with your leyline in play, and a bridge in your yard. Your bridge will stay in your yard and the opponent's creature will be exiled.
Leyline of the Void does not affect creature tokens (they are not cards), so creature tokens dying will cause Bridge from Belows to be exiled. Against nontoken creatures, Leyline of the Void will prevent those from entering the Graveyard and Bridge will not trigger.