Answer:
I believe the answer is city-state structure.
I hope I helped, please correct me if I'm wrong!
Answer:
Most of the work was done by the Roman soldiers.
I'm not sure what you mean by "historically", but there are many key features of London:
Big Ben
Buckingham Palace
the Thames River
London Bridge
London Eye
Trafalgar Square
Hyde Park
Westminster Abbey
the Globe Theater
Answer:
trans-Saharan trade routes
Explanation:
Marco Polo was the most famous Westerner that traveled on the Silk Road at age of 15
