This type of spatial diffusion is called hierarchical diffusion.
Answer:
The Spanish explorer Francisco Pizarro invaded the Incan Empire in 1532, seeking riches. The Inca had already had some contact with Europeans, and many had died of European diseases. The empire was also weakened by a civil war between two ruling brothers.
Explanation:
Boris Yeltsin became a leader of the Russian Federation at the end of the cold war. He is the considered as the first Russian president. But during his term, the country suffered from a widespread corruption. The country of Russia experienced economic collapse and various political problems.
