Answer:
I'm tall when I'm young and short when I'm old. What am I?
I am an object which is used in baseball during the day I can't be seen at all
What loses its head in the morning but gets it back at night?
I was not born but I am here. I have no name but I am given many. I was made by science and life
When I come in from sea to shore twenty paces you'll see No less no more.
Runs over fields and woods all day. Under the bed at night sits not alone, With long tongue hanging out, Resting at your feet until we go for a walk