Which of the following statements concerning current changing social geographies Russia is correct?

The correct answer is: Decline of St. Petersburg and rise of Moscow.

St. Petersburg was the capital of Russia for over two centuries, from 1712 to 1918. However, after the Russian Revolution, Moscow became the capital and has remained so to this day. This shift in political power has led to a decline in St. Petersburg's population and economy, while Moscow has continued to grow and prosper.