I believe that Christianity is one, so what are the other two? Or if I a wrong, what are the three? I'm have trouble pinning them.
Yes you are right, Christianity is one of them. Islam is another and finally pantheism which is the view that the Universe (Nature) and God (or divinity) are identical. Okay, I had to look that last one up but I'll source it. There is a pretty good explanation on GradeSaver for this. I'll give you the link as well below.
http://en.wikipedia.org/wiki/Pantheism http://www.gradesaver.com/the-alchemist-coelho/study-guide/essay-questions/
