Answer:
Humans have two that shrink in the light and expand in the dark
I know a word of letters three, add two and less there will be.
The distance from the top of your head to the floor standing up straight.
Inside a burning house, this thing is best to make. And best to make it quickly, before the fire's too much to take.
A blue man lives in the blue house. A red man lives in the red house. Who lives in the white house?
When is it bad luck to see a black cat?