TPO阅读 Desert Formation的一道题？

雪雪8896

第二题（对应第三段的）
Paragraph 3: Even in the areas that retain a soil cover, the reduction of vegetation typically results in the loss of the soil's ability to absorb substantial quantities of water. The impact of raindrops on the loose soil tends to transfer fine clay particles into the tiniest soil spaces, sealing them and producing a surface that allows very little water penetration. Water absorption is greatly reduced; consequently runoff is increased, resulting in accelerated erosion rates. The gradual drying of the soil caused by its diminished ability to absorb water results in the further loss of vegetation, so that a cycle of progressive surface deterioration is established.
 
2. According to paragraph 3, the loss of natural vegetation has which of the following consequences for soil?
○Increased stony content
○Reduced water absorption
○Increased numbers of spaces in the soil
○Reduced water runoff
A为什么不对？正确答案是B，我明白，但不知A为何不对。
谢谢谢谢！！！！！！！！！

lj19850320

你先说为什么A对。

lj19850320

文中都没有说到这个。