The Great depression and the rising popularity of the radio
Answer:
the Appalachian Mountains
Explanation:
The Appalachian Mountains form a barrier and present a difficulty for those who want to travel the lands in an east-west direction. This hindered the expansion of British colonies in North American America towards the west, leaving that region decolonized for a long time, since the colonizers thought it best not to try to overcome the challenge, since the path was very incest, inhospitable and could present many dangers .
The Great Wall is a fortificated East-to-West line which historically has delimited the Chinese Northern border. Its primary purpouse was to defend the Chinese territory against the invasions and quick raids organized by the nomadic people from the Eurasian Steppe lands, located more to the North.
But rather than as a fixed border, it should be regarded as a transition zone which establishes a distinction between two different lifestyles, even nowadays: the farmer regions in the South with sedentary ways of life and the pasture lands in the North, where its inhabitants have nomadic lifestyles and work mainly in animal husbandry activities.
Answer:
ya like the other person sad on his summary
Explanation: mark the other person branlist
