1] Isolationism - a policy of remaining apart from the affairs or interests of other groups, especially the political affairs of other countries.
Intervention - the action or process of intervening.
Imperialism - a policy of extending a country's power and influence through diplomacy or military force
2] Building the Panama Canal, 1903 - 1914. President Theodore Roosevelt oversaw the realization of a long term US goal - a trans-isthmian canal. Throughout the 1800s, American and British leaders and businessmen wanted to ship goods quickly and cheaply between the Atlantic and Pacific coasts.
The<u> Iron Age</u> was a pre-historic stage in which iron was widely used to make tools and weapons.
<h3>What was the metal used for in the Iron Age?</h3>
Iron was an excellent tool for making tools, tools, and utensils because it could be hammered and did not need to be carved. Hammering the iron was called as 'smithing'.
The Iron Age helped many countries to become more technologically advanced.
During the Iron Age, people throughout Europe, Asia, and parts of Africa began to make tools and weapons in iron and steel.
Thus, the correct option is Option a. Iron age.
To learn more about Iron age, refer:
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I think that the world would be a better place because the money from the usa would be spread all around the world but many important discoveries won't be made
Among the reasons for <span>Europe's success in gaining colonies during the 19th century was their superiority in terms of weaponry and transportation in any kinds of warfare they get involved, in which it could be highly attributed to the technological advancements of Europe at that time.</span>
You are correct! "<span>A cease-fire agreement created a demilitarized zone along the 38th parallel." is the correct </span>answer.