Answer:
Mountains can be very difficult to cross. They are often rugged and filled with forests and wild animals, such as bears and wolves. They may have no natural 'passes,' or easy places to cross the mountains. Mountains can also be hard to climb or may have ice or snow or glaciers that make travel dangerous.
Explanation:
All this means that crossing over mountains - to trade goods or to fight a war - can be tough to do. Sometimes, people who live surrounded by mountains feel very isolated from the world around them. It is just too difficult to cross over to other lands.
One thing I learned from the video was that after purchasing land from Napoleon, Lewis and Clark were sent to explore the land and they were accompanied by a Native American woman named Sacajawea who served as a guide.
Great Britain explored Australia in the late 1700s.
Disease demolished over half of the native population, and native languages were nearly wiped out.
The British learned how to live in the harsh Australian climate by learning from the Aborigines.
British settlers grew more accustomed to the land and attempted to take it from the Aborigines, usually by forc
