Answer:
1
Explanation:
a triangle has three sides and three angles and a rectangle has 4 sides so the formula is n-3 . no in this case equals 4 so 4-3=1
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The right response is D, which provides a theme in American history as an example.
<h3>What were the American eras?</h3>
Eight chronological periods in American and U.S. history are designated by the U.S. History Framework, a manual for teaching history to students in the U.S. These are the Beginnings, Colonization, Revolution, Expansion and Reform, Civil War and Reconstruction, Development of Modern America, World Wars, and Contemporary America.
The complete question is :
In the early years of the United States, almost all Americans lived in rural settings. By 1900, however, many Americans had moved to cities, especially in the urban North. A surge in immigration and the emancipation of southern slaves led these groups, in particular, to settle in northern cities.
This is an example of which theme in American history?
- A.The expansion of civil rights
- B.Progressivism
- C.Egalitarianism
- D.Changing population trends
Hence, the correct answer is option D.
Learn more about American history :
brainly.com/question/1160914
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The freedom of jobs? im terribly sorry :(
