Answer:
I save lives on the ground and in the air. What am I?
I have an eye but cannot see. I am fast but I have no limbs. What am I?
I am a pretty one, fluttering in the pale blue sky. Delicate, fragile on the wing, indeed I am a pretty thing. What am I?
I am a sharp looking horse with a flaxen tail. The longer I run the shorter my tail becomes.
There's a one-story house in which everything is green. Green walls green windows green doors. What color are the stairs?
No matter how little or how much you use me, you change me every month.