The lower levels of the pyramid must also grow-for more people to consumer higher-end items, there must be more people to make those items.
Answer:
I would go with A. Salinity and Temperature
Answer:colonization
Explanation:
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Answer:
Answer: Plains occur as lowlands along the bottoms of valleys or on the doorsteps of mountains, as coastal plains, and as plateaus or uplands. ... Plains may have been formed from flowing lava, deposited by water, ice, wind, or formed by erosion by these agents from hills and mountains.
