I can't think of any. Can you?
1) Naturalistic - Abiogenisis
2) Panspermia
3) Creation by God
4) Creation by a divine entity other than God (Maybe the Angels created life. Maybe the Devil. We have no reason to believe otherwise)
5) Life has always existed everywhere in the universe.
6) Gaia - Earth, and everything alive on it, is part of one large organism.
7) Life does not exist at all - we are mistakingly attributing ourselves with "life" when in fact we are not alive
8) Creation by super intelligent aliens
9) Creation by future Humans sending life back through time (yes, it's a paradox, but still more reasonable than the spagetti monster theory)
That list took about 2 minutes, and frankly isn't all that imaginative or complete.
Why, even if we rule out number 1, should we assume that number 3 is correct. Do we have ANY evidence in support of number 3?
How do we answer the fact that there is an equal amount of evidence supporting number 9 as there is supporting number 3?