Why did many immigrants come to america in the 1800’s

What are two australian geographical features that hindered early exploration? western plateau gulf of carpentaria great barrier reef great dividing range

What is one early technological advance that shaped culture? a the use of fire b the discovery of arable land c family units. d migration

In russia which of these challenges affects the transportation of both petroleum products and other goods? a poorly repaired roads b harsh weather and vast distances c frozen waterways d separatist movements