What Am I Riddles

Question: Everyone has me but nobody can lose me.What am I?

Question: You use me from your head to your toes,
the more I work the thinner I grow.

What am I?

Question: what comes in hard comes out soft and you blow ???????????????????????????????????????/

Question: I climb to the top I dive below I return again For another show.

Question: I'm as small as an ant, as big as a whale. I'll approach like a breeze, but can come like a gale. By some I get hit, but all have shown fear. I'll dance to the music, though I can't hear. Of names I have many, of names I have one. I'm as slow as a snail, but from me you can't run.