The resources that made Kush a valuable trading partner were gold, copper, ebony, and ivory.
The important contribution to navigation made by Eratosthenes in the third-century bc was a reasonably accurate calculation of the circumference of our planet.
Who is Eratosthenes?
Eratosthenes was born in 276 BC and died in 194 BC. He was a well-known poet, mathematician, a researcher in geography, and theorist of music. He was the first to gauge the size of the planet.
The Earth was first measured by Eratosthenes of Cyrene. The precise measurement of Earth's circumference was greatly aided by Eratosthenes' work in the third-century bc.
As a result, the Eratosthenes in the third century bc accurate calculation of the Earth.
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With regard to the the text "The Americans: Reconstruction to the 21st Century" the historical development that contributed most directly to the Market Revolution is the emergence and or increase in new forms of transportation.
It is to be noted that the options referenced are unavailable hence the general answer.
<h3>What is the explanation of the above concept?</h3>
A market revolution was revolutionizing American industry and worldwide trade in the 1820s and 1830s. Independent craftspeople were progressively supplanted by factories and mass manufacturing.
Farms flourished and produced items for distant markets rather than local consumers, exporting them via cheap transportation such as the Erie Canal.
The market revolution spurred tremendous economic expansion and increased personal riches, but it also created a rising lower class of property-less laborers and a series of severe depressions known as "panics," trapping many Americans in never-ending cycles of poverty.
<h3>Who benefited the most from the market revolution?</h3>
Most American farmers' living circumstances improved as a result of the market revolution. For example, a mattress that cost $50 in 1815 (when nearly no one possessed one) cost $5 in 1848. (and everyone slept better).
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Theodore Roosevelt became President of the United States in 1901.
