Answer:
However, if we had to point to a particular moment, we might point towards 1920, as this was the year in which more Americans were living in cities than in the countryside for the first time. One of the innovations that had the greatest influence on this shift was the introduction of the assembly line.
Explanation:
The main issues facing the Jamestown colony's early residents are "Starving period" refers to the winter of 1609–1610 in Jamestown.
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The majority of colonists perished that winter as a result of disease, violence, a weak harvest followed by a hard winter, and poor water quality. The first established English colony in the Americas was Jamestown[a], which was located in the Colony of Virginia. About 4 km (2.5 mi) southwest of the contemporary Williamsburg district, it was situated on the northeast bank of the James (Powhatan) River.
After a brief desertion in 1610, it was regarded as permanent after being established on May 4th, 1607 O.S. by the Virginia Company of London.
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Before Polk, the United States and Mexico had boundaries along the Rio Grande River. Texas and Polk claimed that America's southern border ran down to the river south of the United States' positon back then. They had a war, but Mexico lost and U.S kept expanding.
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