Answer:
I come with a train and go with a train and the train doesn't need me but can't go without me.
Island hello
I'm found in socks ties and hands. What am I?
What is at the end of a rainbow?
I can be any color you can imagine. You see me in everyday life. Look around, you can probably see some of me right now. What am I?
The answer I give is yes, but what I mean is no. What was the question?