What Am I Riddles

Question: What's made of wood but can't be sawed?

Question: I have more shoes than anybody,
but less feet than everyone.
I am met in the morning,
but departed in the night.
I may shake as if I'm angry,
but I won't bite.

What am I?

Question: I open to close but I close to open.
I'm surrounded by water but I'm never soaking.

What am I?

Question: I only point in one direction,
but I guide people around the world.

What am I?

Question: A natural state, I'm sought by all.
Go without me, and you shall fall.
You do me when you spend,
and use me when you eat to no end.

What am I?