Answer:
being bored thats whats up lol
Explanation:
The expensive ingredient that was needed for the cities to expand upward was steel!
Steel was much needed at that time, and because it was not cheap, it took a while to collect and buy or sell!
Hope this helps!
•Incia cities were very beautiful. Built by a builder group called "The Incas"
•The walls were decorated with gold
and floors with silver.
•So it was a very "shiny" citie.
On what book you have to say the name of the book so people can answer you question
