How do i compare the three branches of government under the constitution with a Christmas tree?

I can answer one part of your question re: What does a tree have in common w/ laws? The tree constantly grows new limbs and sheds old limbs. Our laws work the same way. Abortion used to be illegal. Shed that branch. Driving at any speed used to be legal, but is now set to 70mph-add a branch. Get what I mean? You so smart that I am sure you will have a lot of fun coming up w/ your own examples!