comma verbing的用法请教

dm20c1

如果一个句子的后面跟着逗号加上verbing，那么是修饰最靠近这个逗号的前面那一句的名词还是修饰前面那一句的主语呀？

比如：
SC01519中，
原句是：Global warming is said to be responsible for extreme weather changes, which,  like the heavv rains that caused more than $2 billion in damages and led to flooding throughout the state of California, and the heat wave in the northeastern and midwestem United States, which was also the cause of a great amount of damage and destruction.

正确答案是：such as the heavy rains that led to flooding throughout the state of California, causing more than $2 billion in damages
这里的causing跳过了preposition phrase，直接修饰flooding我可以理解

但是另有一句：SC01594中
原句是：Butterflies come in more than 17,000 species, displaying a wing pattern unique to each one.

正确答案是：each of which displays a unique wing pattern
我想请问为什么原句中的不对呢？同样是verbing+ing，这里的displaying也应该可以修饰species，但是书上的解释是displaying修饰butterflies，所以我不太明白，还望赐教，多谢各位了！