Answer:
I can be written, I can be spoken, I can be exposed, I can be broken.
What does everyone know how to open but not how to close?
Round like a dishpan and smaller than a bathtub. But the ocean can't fill it. What is it?
I grow where no flower grows, where no light touches the walls, up or down, that I don't care, was here before people were.
I don't think or eat or slumber. Or move around or fear thunder. Just like you I look the same but I can't harm you or be your bane.
If lightning strikes an orchestra who is the one most likely to get hit?