Answer:
Face with a tree skin like the sea. A great beast I am. Yet vermin frightens me.
When I am alive, people sing. When I am dead, people clap hands. What am I?
I'm white and used for cutting and grinding. When I'm damaged, humans usually remove or fill me. For most animals I am a useful tool. What am I?
The most famous dinner
Until I am measured, I am not known. Yet, how you miss me when I have flown. What Am I?
It comes from crystal and melts to a treat. Add it to your tea to make it sweet. What is it?