18-10AS 阅读 Q22

此题根据关键词“observable change”，“increase”寻读。找到第5行“leads to rapid increases in biomass, abundance, and average size of exploited organisms and to increased species diversity”，同义改写，选A。B选项说的卵的情况，和文意不符。C选项life expectancy指的是寿命，文中没说。D选项说的是迁入（migrating into）保护区的数量，与原文不符合。