Answer:
Never resting, never still. Moving silently from hill to hill. It does not walk, run or trot. All is cool where it is not. What is it?
I drift forever with the current and flows to your everyday life. I make living easy but I am good at killing people too.
I may seem real but it always turns out I was never there in the first place... you only see me during a certain resting stage.
I cannot be burned in fire or drowned in water. What am I?
I have four wings, but cannot fly, I never laugh and never cry; On the same spot Iām always found, toiling away with little sound. What am I?
It weighs next to nothing but no one can hold it for long. What is it?