Answer:
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Capacity of short-term memory
I will explain in an example a good change would be A group of kids planting trees this could make a food source for plant eating animals and it also would create more oxygen
A harmful one would be cutting down trees to make a new mall, This is the exact opposite of the one above, less food for plant or leave eating animals and less oxeygen
Answer:
decreased genetic diversity due to a lack of admixture.
Explanation:
The Neolithic era approx 12,000 years ago.