I believe the answer is B
The first crop that formed the basis of the economy in the Southern states was tobacco. But at the beginning of the 19th century cotton became the most important. During the 1840s and 1850s cotton became the chief United States export. It was known as "King cotton". The rapid agricultural growth of the South led to financial and political tensions between the Northern and the Southern states. Answer: The most important Southern crop in the 1840s and 1850s was cotton.
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The coal-fired steam engine was soon developed. It became the key technology of the Industrial Revolution. In preindustrial Europe, water power was widely used as a source of energy. By the late 1700s, however, steam engines had been perfected
Answer:
Climate change is already affecting the Arab World in dire ways. It will cause extreme heat to spread across more of the land for longer periods of time, making some regions unlivable and reducing growing areas for agriculture. ... The Middle East and North Africa is the most water stressed region in the world.
Explanation:
