The correct response is: The negative connotation supports the author’s opinion that the public should not respond to artwork in an online forum because it breeds conflict.
In the context of the article, the word "fertile" likely has negative connotations associated with the online outrage and often unconstructive criticism that can arise in discussions surrounding art. By emphasizing this negative connotation, the author underscores the idea that such responses may hinder meaningful dialogue and appreciation of art rather than foster it.