Question

What is a kremlin?

a. a walled fortress designed to protect a Russian city
b. a multi-domed cathedral at the heart of a Russian city
c. a palace where the tsar and his family resided
d. a tall bell tower used to call Russian citizens to prayer

Answer 1

A "Kremlin" is known for being a walled fortress to protect Russia City.

Step-by-step explanation:

Answer 2

A Kremlin is "a. a walled fortress designed to protect a Russian city," although it should be noted that the much more popular version is "the" Kremlin, which is the seat of the Russian government.