Answer:
Han?
Explanation:
If by civilizations you mean ethnic groups it would be the Han.
After looking at the photograph given above, one sedimentary rock that probably metamorphosed to form rock on unit 6 is called limestone. You can also use the sedimentary rock called dolostone. Both will be acceptable answers to this question.
The opening of the Panama Canal affected transportation because now, sailors didn't have to sail ALL the way around South America.
