2级
单选题Which of the following does the writer explain?
参考答案：D进入在线模考
D[分析]细节题型
见第三段最后一句：This macabre scenario may help solve several sea mysteries，such as why fishermen report seeing“fish walks”(fish trying to leave the water)and pools of dead fish with holes eaten through them．括号中的内容是对“fish walks”的解释，因此D为答案。
见第三段最后一句：This macabre scenario may help solve several sea mysteries，such as why fishermen report seeing“fish walks”(fish trying to leave the water)and pools of dead fish with holes eaten through them．括号中的内容是对“fish walks”的解释，因此D为答案。
