C) an extensive network of roads that linked it's territories
Native people who dug hundreds of miles of irrigation channels so the answer is C.
good luck
The Vikings were known for their seamanship.
D. He announced a blockade of colonial ports.
Answer:
Economic, Environmental and political.
Explanation:
Permanent move from one country to another due to various reasons is called migration. Throughout history people has moved from one place to another to explore their world. Migration has impacted world culture since its beginning.
There are three main causes for migration, It falls into three categories: Economic, Environmental and political. While speaking of migrations experts talk about push and pull factors.
The factors that push people out of an area are called push factors while the factors that pull people toward an area is called pull factor. Ex. while talking about the environment lack/depletion of natural resources can be a push factor while availability of land at some other place can be a pull factor.
