>>8097833Dead: at first after someone in the cave died no one did s thing with his corpse. It was just lying there rotting, bringing stench and illnesses. So others thought that there must be a substance in the air, something remaining from their relative's body who is very angry on them. Therefore his body must be ridden from, preferably under soil so that he can't get up and come back.
Now, digging a whole in earth sure thing means fertilizing the soil, and because other members of the tribe kept bringing to the dead food and water do his soul won't get mad, sometimes a seed dropped on the fetikized soil, and after a while an apple tree or a bush started to grow, meaning that ancestor's soul is grateful and gives his grattitude. That's where the idea if sacrifice and offerings comes from.