Answer:
What is something that can go up quite easily, but is not as easy to bring back down?
Ch side by side, you are inside.
Rotten trees and Jack-O-Lanterns have this characteristic in common.
I never was but am always to be, and everyone looks forward to me
I have joy in bringing two together, but darning my existence! My life hangs by a thread, filled with ups, downs and resistance!
I'm the source of all emotion but I'm caged in a white prison.
Easy
Animal
Difficult
Food
Funny
Kids
Logic
What am I?