The Russians had turned to a Market system.
Answer: The people migrated to other regions of Central Asia.
Explanation: To escape communism.
The movement of material due to differences in density is called Convection.
Answer:
The high islands of the Pacific were formed by seismic activity whereas the low islands of the Pacific were formed by coral growth. Continental islands and oceanic islands were formed by volcanic activity.
High islands often have fertile soils and lush rainforests. In contrast, low islands are often less fertile than high islands. Some low islands lack freshwater sources.
