TREE & PATH

Hello,

I 'm playing with tree, but different thing are strange.

1) if I have 2 list of 3d point how can I creat a tree with 2 patn (0;0) & (0;1) containing the points

2) if I have a tree and I plug path that return number, what are they representing, how can we use them?

please see the attach file

Thanks for help