Some people think reincarnation is done in the spirit after a person dies dead.
In my village only 800 humans plus the normal animals.
Reincarnation works when molecule atoms from anything gets moved into the molecule atoms of something else.
This way the molecule atoms gets reincarnated and start work living again into something else.
Very hard to understand but very easy.
Imagine a donkey or a camel eat one carrot.
Some people think the carrot dead but the molecule atoms in the carrot still live reincarnate in donkey tummy.
When donkey poop the carrot still alive make manure.
Then manure put on tomato still alive and when I eat tomato the carrot molecule atoms in my tummy and make blood in my body.
If I have give blood transfusion my molecule atoms reincarnate in another body.
Same when I catch cold sneeze into other person and some of my molecule atoms incarnate another person
If that person have sex and make baby my molecule atoms incarnate into the new baby.
My Aunty told me since very young that we everybody have molecule atoms 4 billion year old because molecule atoms never die but only transfer around the world
Nothing destroyed nothing created just shuffle around.
In small village very easy to have huge scale reincarnation because few people get to share everything around the village.
In big cities or vast large country with few humans then molecule atoms stay still for million years and no reincarnation