Answer:
Creatures of power, creatures of grade, creatures of beauty, creatures of strength. As for their lives, they set everything's pace. For all things must come to live. Under their emerald embrace Either in their life or in their death.
Though I have neither legs nor feet, my use is for to go; Although I cannot speak, I tell what others want to know
What number has all letters in alphabetical order when spelled out?
My life can be measured in hours, I serve by being devoured. Thin, I am quick. Fat, I am slow. Wind is my foe.
People are hired to get rid of me. I'm often hiding under your bed. In time I'll always return you see. Bite me and you're surely dead.
I will disappear every time you say my name.