本题目来源于试卷: IB ESS Unit 1 Foundations of ESS，类别为 IB环境系统与社会
[单选题]
Determine which of the following seqaxgkh7 up9.4ev8+rbh uences is an example of a negative feedba/ 7qn .r.g j8z1zrpn ;:avdqvnck mev :rp d;1/8q. rvg.zza7nnnqj chanism.
A. Deforestation → → fewer trees → → more run off → → less infiltration into soil → → less water for trees → → fewer trees
B. Increase in temperature → → increase in cloud cover → → decrease in temperature → → decrease in cloud cover → → increase in temperature
C. Increase in primary production → → increase in falling leaves → → increase in soil organic matter → → increase in soil nutrients → → increase in primary production
D. Thawing of permafrost → → bacteria break down organic matter → → release of methane into atmosphere → → increase in temperature → → thawing of permafrost
参考答案: B
本题详细解析:
Negative feedback lo phd7jjlq+;/ion:lt v -3azd,ops will negate the change and bring the system back to the original, maintaining an equilibrium w,pil qn/+;:3 odhdtz aj -vjl7ith small fluctuations.
Positive feedback loops will destabilize the system and amplify the changes as shown in options A, C and D.
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