Answer:
You heard me before and then again. Afterward I die until you call me again.
I save lives on the ground and in the air. What am I?
I am made by nature soft as silk; A puffy cloud white as milk; Snow tops this tropical crop; The dirtiest part of a mop.
I am all around you but you cannot see me. I have no throat but you can hear me. Valued during summer but despised in the winter.
I come off of a beautiful creature which soars in the sky. I come off of a peckish creature which has a tail as mighty as the sun! I am sometimes dirty and parents beg you not to pick me up.
The sun bakes them, The hand breaks them, The foot treads on them, And the mouth tastes them. What are they?