There's m,any theories as to what the seven rooms symbolize but here are two popular ones. The rooms symbolize the seven stages of life from birth to death or that the rooms symbolize the seven levels of Hell. Take your pick, you can probably argue better for the first one, though. Each color has significance to the stage of life it represents, I can't remember all the different colors, but you get the idea.
The answer I believe it is : the main challenge in a story .
Answer:
black, blade, blame, blank, blaze
2. An unusual gold ring
3. An old beautiful house
4. Red leather gloves
5. An old American film
6. Tiny pink flowers
7. A long thin face
8. Big black clouds
9. A lovely sunny day
10. An ugly yellow dress
11. A long wide avenue
12. New important ideas
13. A nice new green sweater
14. A small black metal box
15. Long black beautiful hair
16. An interesting old French painting
17. A large yellow (?red?) umbrella