Answer:
I'm simple for a few people, but hard for them to hear. I live inside of secrets and bring people's worst fears. What am I?
When I am alive, people sing. When I am dead, people clap hands. What am I?
I am higher than the king
To you, rude would I never be, though I flag my tongue for all to see. What am I?
Dead on the field lie ten soldiers in white killed by one blade yet there was no fight. What are they?
Though not a plant, has leaves. Though not a beast, has spine. Though many wouldn't need this thing, It's more valuable than wine.