What is the best example of a push factor that might cause immigration?

How did industrial production improvements impact export-dependent areas of the world during the great depression?   a.  demand for certain raw materials rose.      b.  demand for certain raw materials fell.      c.  the new technology was exported to most raw material producing nations.      d.  there was a decrease in tariffs.

What was a common theme of folk and rock music created by the 1960s counterculture? a. nonviolence b. hate c. self-denial d. aggression

Which describes a significant different between the north and the south in the year leading up to the civil war