Answer:
I am an object which is used in baseball during the day I can't be seen at all
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 am the kind of a tree that is carried in your hand. What am I?
Forward I am heavy backward I am not. What am I?
Four leaves I have.
What never gets any wetter no matter how hard it rains?