Answer:
I am a protector of the scoreboard.
Light hides me and darkness kills me. What am I?
I am owned by every man though my length differs. Their wives uses me after getting married.
I cannot be bought, cannot be sold, even if I'm sometimes made of gold. What am I?
Before Mt. Everest was discovered what was the highest mountain in the world?
It flows out of the soil, It burns you if it boils, And holds us in its coils, More valuable than gold, As black as it is old.