The Parting of Lot and Abraham is about their literal parting - Abraham took his family to Canaan, as God wanted him to, whereas Lot went to Sodom, and defied God's wishes. Now, having this in mind, maybe this mosaic does symbolize B. heaven, as Abraham and his family would go to heaven eventually, because they obeyed God's orders and wishes.
I would say, the three purposes of theater is communication, entertainment, and for spiritual reasons. However the most provoking and interesting one is the communication. Mainly because it lets the audience create connections with there everyday life as we speak. And may even increase our brains and let us gain new knowledge so we can become better people. It also will let us be able to start more conversations with our peers who have seen it and can relate to that specific film.Hope this helps. (;
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