"Tree" Lesson of Sabbath

Q: The tree in midst of the Garden NOT to eat from was chosen by Who?

A: GOD

But of the tree of the knowledge of good and evil, thou shalt not eat of it: Genesis 2:7

Notice that GOD didn't say "pick a tree, as long as you pick one",etc. .... it was GOD who chose the TREE

Q: Which day is the SABBATH?
A: The 7th day

But the seventh day is the sabbath of the LORD thy God:
Exodus 20:10

Notice GOD didn't say "pick a day, any day, as long as it's one out of seven, or all days are to be a Sabbath", etc.