Answer:
A trail, a union, together tied. Come across me and you will find you cannot change the course I'm on. Without me you cannot travel on. What am I?
What word becomes shorter when you add two letters to it?
A young man wants to have me but when he has me he no longer wants me. Blade in hand he attacks me and does his best to remove me. Yet he knows that it is all in vain.
Tear me off and scratch my head, what once was red is black instead. What am I?
I am the signature stroll of ducks and penguins
Give it food and it will live, give it water and it will die.