题目解析:
根据remove a species 定位到段落倒数第二句话的remove any species:Such a belief would suggest that to remove any species, whether it be plant, bird, or insect, would somehow disrupt the balance, and the habitat would begin to deteriorate.其中提到如果移除了某一种种类,would somehow disrupt the balance, and the habitat would begin to deteriorate. 这句话的内容即题目中提到的effects,只有C选项与这句话同义,decline=deteriorate,habitat意为栖息地,是community的同义转换。A选项根据reduce competition排除;B选项意义相反,排除;D选项为虚假比较,排除。