I am not a believer in reincarnation or materialism...but the materialists have proposed multiple universes to defend their beliefs from the big bang and/or other scientific models that strongly suggest the universe is not eternal but had a distinct starting time. So if the materialists can grasp at such an outrageous straw...perhaps we can allow the reincarnation list to include:
5) We are just one of a vast number (maybe infinite) universes some of which could have evolved life, and souls can be reincarnated in different universes--some of which have a declining number of appropriate animals to balance others like ours which have an increasing number.
My Father’s mansion has many rooms and many realities. Let those who have eyes see them.