Answer:
I tremble at each breath of air, and yet can heaviest burdens bear. What am I?
This guy crossed a road and everyone wants an explanation.
I have six faces but not even one body connected, 21 eyes in total but cannot see. What am I?
I produce wool and spit a lot
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?
Walk on the living, they don't even mumble. Walk on the dead, they mutter and grumble.