Question

why would the author relate lines in that way? to connect the meanings of the two lines to connect the subjects of the two lines to connect the alliteration of the two lines

Explanation:

In literature, authors often relate lines to connect their meanings, creating a cohesive narrative or thematic flow. Connecting subjects or alliteration are secondary aspects compared to the over - arching goal of meaning - connection.

Answer:

to connect the meanings of the two lines