Answer:
The last man on Earth received a phone call, who was the caller?
I'm the source of all emotion but I'm caged in a white prison.
In spring, I am gay in handsome array. In summer, more clothing I wear. When colder it grows, I fling off my clothes. In winter, quite naked appear. What am I?
I begin and have no end. Eventually I will be the end of all that has begun.
I can't go left, I can't go right. I am forever stuck in a building over three stories high. What am I?
What can you lose that will cause other people to lose theirs too?