Help me please I need a topic and a question

Which factor was a major cause of the great depression of the 1930?

Which statements explain reasons why unconformities occur? check all that apply. rocks along a fault break and move. igneous rock forms at earth’s surface. rocks erode and sediment is deposited. no sediment is deposited over a long time. igneous rock forms between sedimentary layers.

After ww2, the soviets began setting up what type of governments in countries closest to them