Rodent: Any of various mammals of the order Rodentia, such as a mouse, rat, squirrel, or beaver, characterized by large incisors adapted for gnawing or nibbling.
A. Ant flies do not attack black ants other than Loma ants.black ants吃rodents,现在存在black ants的天敌Loma ant,这个L对人类有害,所以现在引进ant lies吃Loma ants有利于公共健康。那么加强就是 ant flies只吃Loma ants不吃black ants,就保护了black ants在吃rodents的同时不被Loma ants吃掉,所以保护环境,要是ant flies也吃black ants那还搞屁啊?简化逻辑关系就是black ants吃rodents,Loma ants吃black ants,ant flies只吃Loma ants,但不吃black ants,一环套一环。
原因是错误理解文中一句话:By competing with rodents for seeds, black ants help control rodent populations that pose a public health risk. 以为引入黑蚂蚁是为了经济原因(for seeds),没有看见红字。其实引入黑蚂蚁就是为了健康原因
所以a加强,e如果改成The use of pesticides to control Loma ants could have harmful effects on human health.也是可以有加强作用的