Answer:
I am nothing really at all, Yet I am easily found; Ignore me at your own peril, and you might end up crowned!
A caribbean shape that makes ships disappear
You must keep this thing. Its loss will affect your brothers. For once yours is lost, it will soon be lost by others.
Green arrows grow out of my sides. I go from yellow to white. My babies fly in the wind. What am I?
What has roots that nobody sees, and is taller than trees. Up, up it goes, and yet it never grows.
I have two eyes in the front and a lot of eyes on my tail