Aztecs irrigated and reclaimed swampland so that they could farm.
<u>Explanation</u>:
Aztec refers to people of Central Mexico speaking Nahuatl. The Aztecs were known for introducing irrigation, agriculture and cultivating the land. These people involved in draining swamps and creating artificial islands in the lakes. The artificial island is used for farming.
Aztecs were involved in building pyramids and temples. They learned irrigation to change their habits. Farming became their major occupation. Hieroglyphic writing was introduced by Aztecs. Complex calendar system was implemented and used by Aztecs.
Answer
Production Possibility Frontier
Explanation
The Production Possibility Frontier (PFF) is a curve depicting all maximum output possibilities for two goods, given a set of inputs consisting of resources and other factors. The PPF assumes that all inputs are used efficiently. The (PFF) represents the point at which a country's economy is most efficiently producing its goods and services and, therefore, allocating its resources in the best way possible.
