Answer:
I'm not man's best friend, I'm their enemy, I can mark your end, yet you do not see me, I am very small, but very tough, If you have me, then you have it rough.
It is able to speak because it has a hard gone. You know what it is as soon as it has sung. What is it?
In this place, people lie, people cry, and people ask why. In this place, people sleep, people weep, and people's solitude, they keep. What is it?
I am so simple that I can only point. Yet I guide men all over the world.
I can be moved. I can be rolled. But nothing will I hold. I'm red and I'm blue, and I can be other colors too. Having no head, though similar in shape. I have no eyes - yet move all over the place.
Iām grown from darkness but shine with a pale light. Very round I am and always a lady's delight.