Large seaworthy vessels first appeared in the Mediterranean Sea, but of course it should be noted that they also appeared elsewhere in the world as well.
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The berbers found a way across the Sahara and began trade with West Africa.
Answer:
A) Lack of natural immunity to European diseases
Explanation:
Increasing photosynthesis increases carbon availability for plants. Whether, or to what extent, that translates into increased growth depends on the nature of colimiting factors, especially nutrient availability. Any increase in carbon availability will exacerbate nutrient limitations. (Hope this helps! Give thanks?)
