The second one is push factors, the first one is pull factor, the fourth one is forced migration, and the third one is chain migration, hope this helps.
Answer: GIS connects data to a map, integrating location data where things are with all types of descriptive information what things are like there. This provides a foundation for mapping and analysis that is used in science and almost every industry.
Explanation: hope it helps :)
I believe the answer is basal sliding
Eastern Europe & the (former) Soviet Union transitioned to a:
Market-based economy.
