关于雅思真题7，test2, passage2 question18求解答

雅思阅读真题7，test2，passage2， 18题，Y/N/NG, Several species of wildlife in the British countryside are declining.
对应原文中的话是many of our best-loved farmland birds, such as the skylark, the grey partridge, the lapwing and the corn bunting, have vanished from huge  stretches of countryside, as have even more wild flowers and insects. 想问一下vanish 可以跟decline对应么，一个是消失，一个是减少，答案是Y。求解答，谢谢~~~~~
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好多题目都不可以太钻牛角尖的 这一题就是这样

消失=decline到zero

% G1 H, \- j3 [) V* c好多题目都不可以太钻牛角尖的 这一题就是这样