What are the three important contributions made by acient people living in the firtel creascent?

Who is charon and the river styx? Which famous greek conquered Egypt? Who conquered the incan empire in 1533? Why did democracy end in ancient Greece? What do you call a feather used for writing? What was the date when Ukraine came into existence? Who is the Roman goddess of fertility? How big were Mycenae's walls? How was fish importanat to the Greeks? How did Cyrus the Great start the Persian Empire? What weapons did Theseus use? Why did circes son kill Odysseus? Which ancient Egyptian deity was considered The falcon-headed god most notably being the god of the Sky? What does a Celtic heart represent? How was the Inca empire organized? Where do ingine come from? What did the french first call the first nations? Is Damascus and Antioch in Iraq? What was the last thing Orpheus heard from Eurydice before he left her in the underworld forever? Who was the last Aztec emperor?

What are the three important contributions made by acient people living in the firtel creascent?