In response to the Berlin wall the United States created the Berlin airlift. Supplies were sent on planes and dropped into Berlin. These supplies included things such as food and water.
If there was a sudden, significant event in the area (such as a volcanic eruption) then a population with higher biodiversity is more likely to contain at least 1 species which will be adapted enough to survive in the changed environment than an area with lower species diversity.<span />
Answer:
Explanation:
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The best answer would be:
<span>Tribes are taking more of a role in their own tribal affairs
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B. The actual number of farmers increased between 1840 and 1900.