Best Answer - Chosen by Voters
I'm going to assume that you aren't familiar with the story of Jesus/Christianity... So, I answered your other question about this, as well, so I'll do my best to see if I can help you understand these a little further (again, assuming that you aren't fully familiar with the Christian facts about Jesus...).
First of all, the ones I believe that can be expanded even further are Aslan's representation of Jesus and the Stone Table's representation of the Cross...
Unless you already mentioned this in your paper, you could most definitely mention how both Aslan and Jesus were/are forgiving. Jesus forgives sinners, and that is why he died for sinners...Jesus' love for his people, even though we are all sinners, is what allows him to forgive those who sin. Aslan is forgiving and loving just as Jesus is - even after Edmund betrayed him and led him to his death, Aslan made sure that Edmund was forgiven. If you recall in the book/movie, after Edmund arrived at Aslan's camp, Aslan welcomes Edmund and obviously forgives him for his wrongdoing, and Aslan even makes sure that Edmund's siblings forgive him.
As for the StoneTable/the Cross, I believe it would be logical to mention how those symbols were never forgotten in our world and in the Narnia books. In our world, the Cross has never been forgotten; it continues to be a symbol for people century after century. What I mean is that people wear crosses and crucifixes as jewelery and hang crosses and crucifixes on their walls...Just the same, the Stone Table seemed to remain a symbol for the Narnians in the following Narnia books. You may not have read the rest of the Narnia series, which would make this idea more difficult for you to recall/understand, but in later books of the series the Stone Table still plays a role. If you have seen the Prince Caspian movie, then you would recall that the Stone Table has had a temple (or something of the sort) built around it, even though thousands of years had passed since Aslan's "death" on the Stone Table (so, Narnians still see the Stone Table as a symbol, in a way, just as the Cross is a symbol for us in our world).
Honestly, I can't presently think of ways to expand further on the White Witch/Satan and Edmund/Judas parallels that I mentioned in my answer earlier. That doesn't mean there aren't further ways to expand on these, I just can't seem to think of them right now...
Best wishes!
***Edit: I must add that Abigail M's thought on the Turkish Delight is excellent. Judas did betray Jesus for pieces of silver, just as Edmund betrayed Aslan and his siblings for promise of Turkish Delight...that would definitely be an excellent point to make in your paper, with regard to Edmund being a parallel to Judas.