North America has several different mountain ranges, which presented challenges as settlers moved west. Which of the following best describes a way that mountains benefited North American countries? (3 points) Question 1 options:

1)

The mountains became tourist attractions, which helped the economy.

2)

They provided a physical barrier that protected North America from invasion.

3)

Mountains offered many resources such as coal and minerals.

4)

Overseas trade became easier than transcontinental trade.

according to hess's theory, when the magma cooled, it would expand and push the tectonic plates apart. it would push the north and south america plates to the west and eurasia and africa ones to the east. the atlantic ocean would get wider but the coastlines of the masses would stay the same.

harry hammond hess was a geologist and a united states navy officer in the second world war. he is considered to be one of the founding fathers of the theory of plate tectonics. he is known for his theories on sea floor spreading, stating that the movement of the continents was the result of see floor spreading. the continents are attached to the plates and do not move separately. the plates themselves shift and change shape, carrying the continents along.

i r r e l e v a n t

answer; the candidate for vice president;