The answer is "stacks." That is the object of the phrase, and since a person is searching for something ON the shelf, they aren't searching for the shelf itself.
Answer:
Use Sentence Fragments Sparingly and When the Story Calls for It. Sentence fragments in fiction can be a useful way of conveying pace, tone, and intensity. However, overuse can lead to lazy writing—fragments should be used sparingly, and for a good storytelling purpose. I think it’s when the cast of characters includes just two characters I’m not 100% right on this
He worries<span> that Banquo </span>will<span> be suspicious of Duncan's murder so he decides to kill Banquo and his son Fleance in order to ensure that none of Banquo's people take the throne after him. He doesn't want people to know that hes guilty of killing the king.</span>
