Question

the forbidden city is enclosed by walls. what is important about the construction of the walls?
a the doors in the walls can be removed, making it easier for large crowds to enter and leave.
b they are painted red, a color believed to protect them from rain and water damage.
c they have flower - shaped wooden brackets carved into them, which make them pieces of art.
d the base is wider than the top, making it impossible for anyone to climb them without sliding back down.

Explanation:

• Option A: The Forbidden City's walls were for security, not to facilitate large crowds entering/leaving, so A is wrong.
• Option B: Red paint in Chinese architecture is for symbolism (good fortune, prosperity) and not mainly for rain protection, so B is wrong.
• Option C: Flower - shaped wooden brackets are features of the buildings (like palaces) in the Forbidden City, not the walls, so C is wrong.
• Option D: The walls of the Forbidden City have a wider base than top, which is a design to prevent climbing, matching the security purpose of the Forbidden City.

Answer:

D. The base is wider than the top, making it impossible for anyone to climb them without sliding back down.