Answer:
Lighter than what I am made of. More of me is hidden than seen. What am I?
In the sun I like to play; in the rain I goes away; walk or run I always follow; in the mud I always wallow.
I will go within you and destroy you. Only because you wanted me too
If I drink I die. If I eat I am fine. What am I?
I make you weak at the worst of all times. I keep you safe, I keep you fine. I make your hands sweat and your heart grow cold. I visit the weak, but seldom the bold. What am I?
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.