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.
Thomas Jefferson objected to Alexander Hamilton's proposal for a national bank because: he interpreted the Constitution very strictly, and believed that the Constitution did not give the national government the power to establish a bank.
Hope this helps :)
The technologies were only used to observe enemies but as their effectiveness became apparent, both sides started to dismantle what they were using. For example, they shot down the planes that they would see causing more death.
However, determining the precise beginning and ending to any "period" is often arbitrary, since it has changed over time over the course of history.