Answer:
Indian removal was a forced migration in the 19th century whereby Native Americans were forced by the United States government to leave their ancestral homelands in the eastern United States to lands west of the Mississippi River, specifically to a designated Indian Territory (roughly, modern Oklahoma).
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Eurasia has more number of tropical animals as compared to the America's zoological set.
Explanation:
The warm environment and the presence of tropical forests makes the Eurasia suitable for the animals and thus increasing the tropical animals in the country. The tropical Atlantic warming deviates from the Rossby wave train. This leads to the increase in Arctic sea-ice and Eurasian warming.
Eurasia formed 375 to 325 million years ago with the merging of Siberia, Kazakhstania, and Baltica, which was joined to Laurentia, now North America, to form Euramerica. Chinese cratons collided with Siberia's southern coast.
I think the answer is B :))
became more efficient and lofs nire production