How can increased carbon dioxide uptake, or sequestration, by global forests change climate?

carbon dioxide uptake by forests led to the end of the pleistocene epoch.
net global forest growth removes carbon dioxide from the atmosphere, thus cooling the earth’s climate.
increased carbon sequestration leads to increased tsunami frequency.
as forests expand, carbon dioxide is lost to the atmosphere.
increases in forest cover lead to increased flooding.

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Answer is b)eutrophication occurs when excess nutrients are present in aquatic ecosystems, resulting in the increased production of plant life and the subsequent decrease in the oxygen levels of the watereutrophication occurs when there are excess nutrients in a body of water. this results in plants having more food and reproducing  more, sometimes leading to more aquatic animal life as well. ultimately, this can reduce the oxygen level in the ecosystem. 

A: buys very few of because that's the way they can get through customs.