Answer:
people can preserve culture by documenting it and passing traditions on to younger generations.
Throughout most of China's history it was ruled by powerful families called dynasties. The first dynasty was the Shang and the last was the Qing. Ancient China also boasts the longest lasting empire in history. It began with the Qin dynasty and the first emperor Qin who united all of China under one rule in 221 BC.
"The Huna People, also known as Huns, invaded Gupta territory and caused significant damage to the empire. The Gupta Empire ended in 550 CE, when it disintegrated into regional kingdoms after a series of weak rulers and invasions from the east, west, and north."
In the 1970s, the supply of gas was affected by price controls imposed by the Nixon administration and then by an oil embargo by Arab members of the Organization of Petroleum Exporting Countries (OPEC).
As a political move aimed at pleasing voters, President Richard Nixon announced in 1971 (prior to his reelection campaign of 1972), "I am today ordering a freeze on all prices and wages throughout the United States.” The wage and price controls the Nixon administration sought to put in place interfered with natural market forces and oil supplies were reduced. That problem was magnified in 1973 when oil exporting countries in the Arab world imposed an embargo on supplies to the United States due to US support of Israel in a war that Israel was fighting against a coalition of Arab states.
Both factors -- lingering efforts at price controls and continued control of the oil and gas market by OPEC nations -- played into the long lines at gas pumps seen in America in the 1970s.
