Answer: It supports the text as a whole because it helps you to comprehend what is happening or going on a little better.
Explanation:
Neighbor is a singular noun.
Yet, somehow, he is also “lovable,” and dull and proper though he may be, he has many friends. His lovability may stem from the only interesting quality that Stevenson gives him—namely, his willingness to remain friends with someone whose reputation has suffered.
i hope this maybe helps
D. Jones is a well-known poet—not that I like his work that much.
