Answer:
The Ohio Gang was a gang of politicians and industry leaders closely surrounding Warren G. Harding, the 29th President of the United States of America.
Explanation:
I believe the answer is:
- Pure mathematics
Proven by the difference in knowledge on astronomy between aztec culture and the Castillian.
- Urban architecture
Proven by the superior irrigation system that Aztec civilization had compared to Castilian civilization at that time.
Answer:
Evidence, clues, or pieces of the past
Explanation:
They need some way of knowing, so they study evidence,clues, and pieces of the past to figure out history.