What Am I Riddles

Question: Light hides me and darkness kills me.

What am I?

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

What am I?

Question: What am I?

Question: Remembered are the days when I was used, bloodied and beaten... I was abused. Death surrounded me, and it mattered not, as no matter the pain I inflicted, I'd never rot. What am I?

Question: What is hot but doesn't burn?