Answer:
I'm not alive but I grow I don't have lungs but I need air I don't have a mouth but water can kill me. What am I?
I have a neck but no head arms but no hands. What am I?
Of the king I am blue and of the peasant I am red. Of the frog I am cold and of the dog I am hot instead. What am I?
Always in you, sometimes on you. If I surround you, I can kill you. What am I?
Many people own a copy of me. Without me the world would fall.
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.