The wide area of dry land that borders the southern edge of the Sahara.
Kennedy gave them money to help them.
Answer: The North exported wheat and corn to Britain.
Explanation: learned ab this last yr, hope it helps
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The correct answer is B) emergence of a written language
Unlike the other mentioned things, emergence of a written language did revolutionize Native American cultures. Everything else mentioned here was just there and completely normal as they were hunters and what not.
Do you have the options? If not I'd say European Imperialism was started by Portugal.