Answer:
I'm tall when I'm young and short when I'm old. What am I?
I save lives on the ground and in the air
I can go through glass without breaking it.
Born in the ocean and white as snow. When I fall back to water, I disappear without a trace. What am I?
Tear me off and scratch my head what once red is now black.
An open ended barrel, it is shaped like a hive. It is filled with the flesh, and the flesh is alive!