Answer:
The richest people in the society (like elon musk or the kardashians lol) were called "aristocrats". Over a third of society were women and children, the others were men. Women were considered citizens but were not able to vote. Freeman, men who were not slaves (but were second-class to the common people), were not allowed to vote or participate in government (like run for senate or smt). Freemen made up around 10% of the population. They often were not born in Athens and moved there to find good jobs and make money. Freemen were often craftsmen and merchants. When the economy started going up, the number of merchants increased and trade increased as well. Slaves made up 1/3 of the population, and slaves were mostly prisoners of war (people captured in war). Slaves were considered private property, owned by an individual and not the government.
The executive branch has the president. The other two branches are the legislative (which has the Congress) and the judicial (which has the courts).
Marco Polo traveled during the middle ages (AP period 3), for this the communication technology was not very advanced and Western Europe didn't really know the situation of East Asia and vice versa. When Marco Polo explained his travels to the Europeans of the greatness of China many Europeans decided to go and see for themselves if this greatness was indeed true. When the Europeans arrived in China they were very impressed and a new promotion of travel to China emerged, INCREASING China's economy.