Answer:
What goes up let's of a load and come back down
Soldiers fight it but never changes.
What has been around for millions of years but is never more than a month old?
What can run but never walks, has a mouth but never talks, has a head but never weeps, has a bed but never sleeps?
Hearing something unexpected or touching a live wire can have this effect.
you hold my tail while I fish for you
Easy
Animal
Difficult
Food
Funny
Kids
Logic
What am I?