Answer:
Assuming you mean ocean ridges, it would be D.
Explanation:
A mid-ocean ridge is formed by seafloor spreading. New ocean crust is formed by magma getting pushed up. The plates move away from each other so the crust would have room to form.
I have attached a picture of the process for visual explanation.
Nationalism would be the answer
Answer:
Moscow was the capital of USSR and was more of an urban area. The political elite of the USSR lived there and their concerns were different from what the envisioned for the rest of the Soviet Union.
Explanation:
Farming in USSR was mostly done through collective farming. In fact, the Soviet government did not want private cultivation of land and instead encouraged and even forced people for collective farming.
The Soviet Union bevelled that most peasant farmers were 'reluctant' revolutionaries and if left on their own, might want to counter the soviet government.
Collective farming was a way to not just control food supplies but also subject peasants under a disciplined system of government control.
