Answer:
I am wood that is neither hard straight or crooked
I am a little piece of paper, yet sometimes hold lots of value. I am all you need to get into big events, but will cost you. I am an important part of travel. And if lost, you're not coming. What am I?
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 stink in living but when dead smells good.
I can swim but never get wet. I can run but never get tired. I follow you everywhere but never say a word.
It produces a flower but it is not its fruitΝΎ it produces branches which are its fruit.