Answer:
You see a boat filled with people. It has not sunk but when you look again you don't see a single person on the boat. Why?
I never was but always will be. No one ever saw me but everyone knows I exist. I give people the motivation to better themselves everyday
I climb higher as I get hotter. I can never escape from my crystal cage.
Everyone has me and no one can lose me. What am I?
I make a loud sound when I'm changing. When I do change I get bigger but weigh less. What am I?
It has no top or bottom, but it can hold flesh, bones, and blood all at the same time.