Answer:
Explanation of urbanization
Step-by-step explanation:
In the fifth paragraph it mentions this specific piece of evidence: "The urbanization of the United States quickened due to technology improvements." This statement is supported by this piece of evidence: "The trend quickened after 1860 and continued throughout the 21st century as well. By 2007, more Americans lived in or near cities than they did in rural areas."
Hope this helps...