What did fear/pressure do to Stalin's son Vasily?

List three reasons why explorers began to explore new, and old areas. [[ps: doesn't explicitly say where. i think it's more in general.

The revolutions in latin america in the 19th century resulted in political independence from europe the end of slavery in each country the establishment of stable democracies social and economic equality for all

What major land feature is located at 0* and 20* e? a sahara desert b kalahara desert c congo basin d the alps