This is a part of reading text.
"Although it is intuitively clear that an increase in antipredator behavior lowers an animal's risk of predation when predators are present, such benefits are not easily demonstrated. One study that (1)did so found that well-fed guppies are more alert for predators and are consequently less likely to be killed than are their hungry counterparts,(2)which feed with greater intensity."
Those two underlined parts are what I'm struggling with.
First, which part is referred to by "did so" in the text?
Second,which entity is related to the relative clause? Is it "their hungry counterparts" or the previous sentence?
That text is not well written. I take it that "did so"means demonstrated the benefits . cho7712 which feed with greater intensity In that, "which" refers to their hungry counterparts .
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That text is not well written. I take it that "did so"means demonstrated the benefits.
cho7712which feed with greater intensity
In that, "which" refers to their hungry counterparts.