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Unprecedented Urbanization. Between 1820 and 1860, the visual map of the United States was transformed by unprecedented urbanization and rapid territorial expansion. These changes mutually fueled the Second Industrial Revolution which peaked between 1870 and 1914.

Explanation:

The Second Industrial Revolution affected the North, South, West, and Midwest with changes such as population, transportation, and economy changes. These railroads connected cities and were used to transport natural resources and goods from manufacturers to other places.

when studying cause and effect, historians usually group the causes into different categories. for example, cultural causes reflect how a society’s literature and art convey the way the society saw itself in relation to the rest of the world. another resource that historians use to understand society is pop culture, which tells them the trends and ideas that are preferred by the common people. when studying cause and effect, it’s important to remember multiple causation, or the idea that an effect could have several causes and vice versa.  

the correct option is “cultural causes” since art and literature are related to the culture of a place. culture is determined by literature, art, music.

the correct option is “pop culture” since it reflects the likes and ideas of common people whereas the rest of the options do not focus on common people.  

the correct option is “multiple causation” since it refers to the idea that events are caused by multiple reasons, not just a single one.  

a woodchuck would chuck 12.5 wood : 3