Answer: The valleys of the Tigris and Euphrates rivers were the site of the world's first civilizations. The rivers of Southwest Asia supported the growth of civilizations. New farming techniques led to the growth of cities.
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Explanation:
Answer: In a sense they were snobbish, the only reason for colonization was gold and to spread their faith to the Native Americans. In the attempt to do that most thought of the natives as savage and nonhuman. They believed themselves as the predominant race and the owners of the land the natives lived on. Many were greedy and only thought of what they could gain without thinking of the consequences of their actions.
Explanation: millions of Native Americans died not only from the diseases that were brought over but from the force labor and conquest of the conquistadors.
Cars became popular in 20th century. I think this is the right answer.