Answer:
You can always find me in the past. I am created in the present, but the future can not change me. What am I?
I have a strong affection for belly buttons.
found at the back of the book.
Weight in my belly trees on my back nails in my ribs feet I do lack.
I go up when the rain comes down. What am I?
Give it food and it will live, give it water and it will die.