<span>They continued their prosperity by moving south of the Huang River. There they ruled for another 150 years.</span>
They attacked flight crews.
Answer:
The Sahara
Explanation:
North Africa and West Africa had limited trade because of Sahara until the Camel became domesticated, they started to trade. The only way they traded was from the Atlantic coast which was long journey.
The answer is B. Scientists study artifacts they discover to form ideas on what life was like in the past. Sometimes there will pieces that doesn't make sense and so they study some more until it makes sense.
