Answer:Obsidian was volcanic glass in a ring of volcanoes along the Pacific coast of the Maya area. Mayan technicians made techniques for cutting sharp blades. As said, Mayans used specialized jade tools that helped their technological achievements. Maya is thought to be the first civil engineers of the Americas.
Explanation:
The correct answers are B) death of the emperor and C) invasions.
The two reasons for the fall of the Ming Dynasty were the death of the emperor and invasions.
In the middle of the 17th century, the reserves pf silver considerably diminished in the Ming empire and people started to suffer from hunger. The Emperor did nothing to alleviate the situation and the people got angry at him. The Jurchen people, now called the Manchu, declared war against the Ming Emperor. The leader of the Manchu was Nurhaci. Ming Emperor, Chongzhen, hanged himself, and the combination of this, internal discontent, and invasions, ended the Ming period.
The Punic Wars began after Rome started expanding their territory after conquering Italy and Sicily. They then turned their attention to Carthage (which would now be parts of modern-day North Africa, the southern Iberian peninsula and the western Mediterranean). The Punic Wars happened because Rome was interested in Carthage, because it was the dominant power at the time.