Answer:
What's the capital of France?
Against the sun I protect your eyes and am often worn on the face of spies
I can be written, I can be spoken, I can be exposed, I can be broken. What am I?
I have an eye but am blind, a sea, but no water; a bee, but no honey; tea but no coffee; and a why, but no answer. What am I?
Part carbon part water I am poison to the fishes. Many falsely claim my name I am the pause that refreshes.
No matter how little or how much you use me, you change me every month.