The correct answer is the following.
The correct matches are the following.
-Maya: reasons for the decline are unclear.
-Inca: chose rulers through a system of heredity.
-Aztec: established a tribute empire.
We are referring to important prehispanic civilizations in America and South America.
The Aztecs were one of the most important civilizations in Mesoamerica. They had its capital city in the great Tenochtitlan(nowadays Mexico City). They were fierce warriors that established a tribute empire where neighborhood tribes had to pay tribute for protection. This tribute was for the Emperor. The Aztecs also had human sacrifices at the top of its two most important pyramids in Tenochtitlan.
The Mayas was another great prehispanic civilization that inhabited the territories of the Yucatan Peninsula and Chiapas state in Southeast Mexico, as well as Belize and Guatemala. They were great astronomers. Nobody knows the exact reason for why and how they disappeared. The Incas was the great civilization in South America that built the wonderful city of Machu Pichu, in Peru. They were great farmers and chose rulers through a system of heredity.