Europeans carried a hidden enemy to the Indians: new diseases. Native peoples of America had no immunity to the diseases that European explorers and colonists brought with them. Diseases such as smallpox, influenza, measles, and even chicken pox proved deadly to American Indians.
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Answer:
19 -B --> makes the most sense based on the events in the diagram
20- C --> this is a long-term effect
By painting scenic landscapes
Answer: Irrigation and terraces are still used today.
