You can sit on me, some people might take a nap on me, or if I'm in a courtroom you might approach me, by invitation only of course. What am I?

I am born from trees but am flat as a board, I can hold all your secrets or a king's spoken word.

Almost always found on a desk or workbench, I'm nothing like a wrench. I'm good at attaching things to an anchor point, just not too much at once or papers become disconjoined.

Catch a breeze to scent your linens But if it rains, you’ll be unpinnin’ Stretch me out to hang up high And soon your laundry will be dry

I have ribs but no lungs. I have a door but no rooms. I am made of bars, but I serve no drinks. I can keep danger inside, or keep danger outside. Without a key, my shape defines your world. What am I?