Answer:The Characteristics of Modern Agriculture Enabled by Chemicals. The evolution of agriculture in the world's rich, developed countries has four defining eras: settled agriculture; blood, sweat and tears; mechanical; and chemical.
Explanation:
What caused the sinkhole?
How can we prevent it?
Where might this happen again?
Answer:
Territories obtained in the Mexican American War of 1848 caused further sectional strife over the expansion of slavery in the ante bellum period. ... The ideological seeds of the American Civil War, in turn, were sown during that conflict.
Explanation:
<span>Political instability is your Answer</span>
The exchange that took place during this time was called the Columbian Exchange
