Answer:
second answer is volcano
third answer is avalanch
Explanation:
please mark brainlist hope is useful
Answer:
The reasons that cities boomed during the Middle Ages are more employment opportunities, increased trade, and growing interest in culture and art.
A mountain is a single standing one such a Mount Fuji. A mountain range is a chain of mountains such as the Himalayas
A biggie: the transcontinental railroad. Because it would economically improve wherever it was, both the North and the South competed for the railroad to be in their respective territory, evidenced by the Kansas-Nebraska Act and the Gadsen Purchase and induction of California as a free state in 1860.
In addition: people could get land cheap because it was abundant and might leave to start afresh economically.
There's other stuff I can't remember as clearly, but there's a little and I hope it helps :)
D Eurasian plate and Australian plate
