Answer:
Pax Romana --> The time of greatest achievement under the Roman Empire.
Republic --> A government run by representatives of that country's citizens.
Aqueduct --> A structure used for carrying water over long distances.
Foundation Myth --> A society's story about its origin.
Explanation:
The Pax Romana was a time of peace and prosperity in the Roman Empire, a republic is a type of government where representatives that are chosen by citizens rule. Aqueducts were used by the Romans as a sewer system, they carried water.
They were important because they were not controlled by the government or the church. Therefore they were free to explore in scientific experiments as much as they wanted without these controls.
You are going to have to search it up online to get your answer
What time period? maybe with a little more info I can help you