The settlement of the Americas began when Paleolithic hunter-gatherers entered North America from the North Asian Mammoth steppe via the Beringia land bridge, which had formed between northeastern Siberia and western Alaska due to the lowering of sea level during the Last Glacial Maximum. Due to this migration the mammoths were hunted to extinction, most of Americas animals that were alive before they entered the Americas were eventually hunted to extinction
phytoplankton are scarce in remote ocean gyres due to nutrient limitations. Phytoplankton are most abundant (yellow, high chlorophyll) in high latitudes and in upwelling zones along the equator and near coastlines. They are scarce in remote oceans (dark blue), where nutrient levels are low.
<span>One reason that shifting cultivation was so sustainable in the past was because there were just not as many people, the population was much lower overall than it is today, and this provided plenty of open land that could be used solely for cultivation,.</span>
Answer:
Option: Gold and Salt Trade
Explanation:
The trade of Gold and Salt was the reason for the richness of Ghana, Mali, and Songhai. They were the great trading states of West Africa. Throughout their period of existence, they dominated the trade of Gold, Salt between North Africa and Sub- Saharan Africa. The Famous city of West Africa was Timbaktu and it was famous for production of books.
