Answer:
The emergence of the Soviet Union, the Revolution, the Civil War and the collapse of the USSR are the most obvious historical traumas of modern Russia
People immigrate for many reasons, some of which include economic or political reasons, family reunification, natural disasters, or the desire to change one's surroundings. Immigration can represent an expansion of the supply of labor in the host country.
I think it is the third answer choice
Answer:
Industrail revolution
Explanation:
they went from farming to manufacturing
